For that reason, and because the Taliban is continuing its resurgence, General Myers says President Obama should take enough time to get the strategy right, but not too much time.

VOA: standard.2009.10.16

But you're right, Trans fat is not good for you and its worse then saturated fat.

答对了,反式脂肪对健康有害,甚于饱和脂肪

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

When it cuts it leaves sticky ends or un-base paired single stranded regions on each end of the part its cut and that's just a property of many restriction enzymes; not all, some cut blunt,just right down the middle.

它切割后会留下两个粘性末端,或者未配对的单链部分,这是许多限制性内切酶的特性,但不是全部,有些限制性内切酶是从中间钝切的

耶鲁公开课 - 生物医学工程探索课程节选