To get the winning policy and not to overpay for it can turn to either simple or extremely difficult task.

獲得冠軍的政策，而不是過高它可以把任何簡單或極其困難的任務(wù)极品粉嫩福利午夜在线播放。

This is because the political and military position of Palestine guerillas is an extremely difficult one.

這是因為巴勒斯坦游擊隊的政治和軍事地位国产日韩视频一区，是非常困難的。

However, the translation of English pun is always considered to be extremely difficult.

然而14女一级毛片A视频，英語雙關(guān)語的翻譯又是極其困難的91国语自产精品，很多人甚至認為是不可譯的，因為英漢兩種語言的語音不一樣欧美激情三区，兩種語言的多義詞并不能一一對應(yīng)美女黄色性插插视频，但英語雙關(guān)語還是存在一定的可譯性。

However , there is no market price for natural resources , and the quantification of damage is extremely difficult .

盡管我們認識到這一點五月天色婷婷综合，但是狂插网，對于沒有市場價格的自然環(huán)境資源來說，計算其損害數(shù)額的是個難題久久一级婬A片AAA毛片女人。

It may be due to the following two reasons: 1 High steric hindrance caused by rigid structure of substituted fluorenone preventsthe approach of the chiral reductor;2 The prochiral center is, moreover, linked to two coplanar aromatic rings, which due to strong conjugation are highly electronically similar and thus it becomes extremely difficult to distinguish between them.

主要是以下兩個原因：1取代芴酮的剛性結(jié)構(gòu)產(chǎn)生高的空間位阻在线一级油黄片，阻止了手性催化劑的接近新国产在线精品免费AV；2潛手性中心旁的兩個芳香環(huán)不僅立體構(gòu)型非常相似五月婷婷丁香综合伊人一区二区三区四区，而且高度的電子相似，很難被手性配體識別99久久性爱白浆。

All of this makes the net benefit of reforestation extremely difficult to measure.

所有這一切都使得重新造林的純利益極難估算三级特黄AA片视频在线。

It's extremely difficult for some people to save for their retirement.

這是極為困難的一些人以節(jié)省他們的退休生活。

It is extremely difficult to rouse my father in the mornings.

每天早上要把我父親叫醒可真不容易又黄又爽的黄色视频。

Mister Sagan worked for many months on what to say in the message. It was an extremely difficult task.

薩根先生為這條信息應(yīng)該說些什么忙了好幾個月26uuu欧美杂交，這是一項非常艱巨的任務(wù)。

Also, it is extremely difficult to respond satisfactorily to words you didn't hear.

而且国产精品特级毛片一区二区在线，對自己沒有認真聆聽的問題做出滿意的回答是極其困難的国产92AV视频。