Rack one's brain,英文的解釋是to cause great mental suffering, to torture brain by means of the rack.

即，用盡心思去思考事情黄色无码视频在线免费观看，太用心了，好象飽受精神上的折磨啪啪一级视频。用漢語(yǔ)中的"絞盡腦汁"來(lái)形容正好。

Rack one's brains; rack one's wits about sth.; task one's mind

例句碰到了這個(gè)難題日韩欧美人妻综合在线；他～也想不出解決的辦法來(lái)国产zaixian自拍。

Rack one's brains 絞盡腦汁 He had to rack his brains to solve that complicated problem.

他不得不絞盡腦汁去解決那個(gè)復(fù)雜問(wèn)題。

The roof rack system with sliding rail s and a single-hand adjuster for horizontal rack can accommodate objects as heavy as 75 km.

車頂行李架與車頂滑軌配合得天衣無(wú)縫18岁不能看的网址，它可以承載75公斤的重量

The roof rack system with sliding rail s and a single-hand adjuster for horizontal rack can accommodate objects as heavy as 75 kg.

車頂行李架與車頂滑軌配合得天衣無(wú)縫1024看片无码人妻日韩，它可以承載75公斤的重量

The paper introduces the basic structure and transmission principle of push rod rack drive and gives the formula and recommendatory value of the main parameters of the push rod rack drive,which provides a theoretical basis for its design and manufacture.

介紹了推桿齒條傳動(dòng)的的基本結(jié)構(gòu)和傳動(dòng)原理，給出了推桿齒條傳動(dòng)主要參數(shù)的設(shè)計(jì)公式與推薦值后λ式吃奶动态后λ式视频，為該傳動(dòng)的設(shè)計(jì)及加工制造提供了理論依據(jù)

Alloy frame, Double Wall Alloy tire circle, Dishing brake, forging suspension front fork, Alloy adjustable handlebar stem with gears, alloy handle, alloy retroflex saddle tube, alloy adjustable rack, middle parking rack, Alum-plating electric mudgurads, alloy cranks, 1.75 glisten tires. SHIMANO 6-speed chains linker, SHIMANO gearlever, spring saddle,24V.9AH/13AH battery, intelligent meterplate, LED front and rear lights, 3-grade Electric Assist Driving System（1st,Bike;2nd,1:1 Standard Riding Pull-assist; 3rd,Strong Pull-Assist） 6-grade Manual speed changes,1.8A NiMH Battery chargerAlloy Power-cut Brake handle

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Motibity changed by gear-box in direction and rotate speed is transferred to the blade axis on the right side to drive the blade axis. blade axis'parameter, blade assembling frame and blade assembling means are ascertained. The load and movement of the blade axis are analyzed. And the best blade rotate speed is ascertained. According to the request of no-tillage soil, the appropriate furrow openers are chosen. They are staggered and assembled in two rows .According to the sliding cutting request, the crucial parts of the anti-blocking——the sliding cutting blade, its edge curve is analyzed and designed in principle. The academic curve function is gotten. Combined with working practice and technics request, the blade's figuration parameter is designed, 65Mn is chosen as the material for blades. The working load is analyzed. And the intension of the sliding cutting is analyzed and checked with ANSYS software. At last, the spring rack of the suppress wheal is analyzed in principle. The theory and parameter of designing the spring rack of the suppress wheal. Experiment indicated that the anti-blocking capability of this anti-blocking equipment was excellent.

設(shè)計(jì)出適合此防堵裝置的動(dòng)力傳輸方案老年黄色视频免费网站，動(dòng)力經(jīng)變速箱變向變速后從右側(cè)傳給刀軸欧美大码变态另类，驅(qū)使刀片切割秸稈毛片高清无码在线；確定出了刀軸的參數(shù)影音先锋强奸乱伦av电影、刀片的安裝結(jié)構(gòu)和安裝方法国产wwwjizz，對(duì)刀軸的受力和運(yùn)動(dòng)進(jìn)行了分析，確定出了刀軸最佳轉(zhuǎn)速美国午夜精品久久热；根據(jù)免耕地的要求，選擇恰當(dāng)?shù)拈_溝器日韩精品视频一区中文字幕，并采用雙排錯(cuò)位安裝的辦法欧美日韩在线一区二区，避免了"瓶頸"現(xiàn)象的發(fā)生；根據(jù)滑切的要求對(duì)此防堵裝置的關(guān)鍵部件——滑切刀片的刃口曲線進(jìn)行了理論分析和設(shè)計(jì)色视频精品视频在线观看，得到了刀刃的理論曲線方程日韩欧亚自拍视频在线播放网站；結(jié)合生產(chǎn)實(shí)踐及工藝要求，設(shè)計(jì)出刀片的外形參數(shù)直接看的黄色网址，選擇65Mn作為刀片的材料欧美成77777；分析和計(jì)算了刀片在工作中承受的載荷，運(yùn)用ANSYS 軟件對(duì)滑切刀片的強(qiáng)度進(jìn)行了分析校核91人人超碰人人超碰人人超碰；最后對(duì)鎮(zhèn)壓輪的彈簧支架結(jié)構(gòu)進(jìn)行了理論分析国产老熟女啊啊啊插的好深，提出了設(shè)計(jì)鎮(zhèn)壓輪彈簧支架的理論和參數(shù)依據(jù)。

The winning post appeared in the next rack, and the transplanted Philippino star would take no more chances as he won the fourteenth rack to take the victory with a 9-5 scoreline.

得獎(jiǎng)后出現(xiàn)在未來(lái)的機(jī)架男女色综合，以及移植菲星將采取任何有更多機(jī)會(huì)為他贏得了第十四機(jī)架采取的勝利黄色精品免费观看，與九月五日比分。

The winning post appeared in the next rack, and the transplanted Philippino star would take no more chances as he won the fourteenth rack to take the victory with a 9-5 scoreline.The final between Martel and Montal was contested over a race to 11 racks.

得獎(jiǎng)后出現(xiàn)在未來(lái)的機(jī)架全彩里番h无遮挡动态GIF图，以及移植菲星將采取任何有更多機(jī)會(huì)為他贏得了第十四機(jī)架采取的勝利日韩男女AAA，與9月5日scoreline.the最后之間的馬特爾和蒙塔爾是有爭(zhēng)議的一個(gè)種族至11架。