So we need to be sure about it that the axis of the cylinder hole and the axis of the crankshaft hole cross each other.

因此，我們需要確保它認(rèn)為一级毛片视频在线看，軸的缸孔和軸的曲軸孔跨對(duì)方中国一级A一级a爱片免费免免。

You can be sure about their interest in it.

你可以肯定他們對(duì)此很感興趣ww黄色。

Before you buy any wireless equipment, you need to be sure about what you're doing.

之前，你買(mǎi)任何無(wú)線(xiàn)設(shè)備免费在线黄色网站视频，你必須要知道你在做什么大BBBB高潮。

Start your application now so you can be sure about your future.

你現(xiàn)在開(kāi)始申請(qǐng)，以便你可以肯定你的未來(lái)97超碰在线频。

The researchers point out that there are many things they cannot be sure about .

研究人員指出黄色美女福利视频，有很多事情是他們無(wú)法確定的。

Something that you can be sure about here is that your day will not go as you expect it to.

在這里久久夜晚黄色视频，你能確定的是你的日子不會(huì)按你的期望來(lái)過(guò)亚洲精品一二三区尤物tv。

The researchers point out that there are many things they cannot be sure about.

研究人員指出，有很多事情他們不能肯定色8久久人人97超碰香蕉987。

The trouble is that it is extremely difficult to be sure about radiation damage.

麻煩的是av黄色电影免费日韩，很難予以肯定的輻射損傷。

Be sure about / of sth.

我對(duì)這次考試沒(méi)有把握未满十八av网站。

I wouldn't be sure about that, Ives.- Don't know how you can be so confident.

我可不這么想影院理论，埃福斯先生-我不知道你的自信是哪來(lái)的？