Men make a thousand sperm every second and to have an effective contraceptive, 每秒中，男性可生产出一千个精子，所以有效的避孕药 you need to get that level of sperm production down to one percent of its normal value. 必须把这个精子生

Hi, everyone. I'm Sirena. I'm 11 years old and from Connecticut. Well, I'm not really sure why I'm here. 大家好，我叫黄凱珉。我今年十一岁，来自康涅狄格州。嗯，我确实不知道我为什么会在这里。 I mean, what does this have to do with technology, e

8:01 P.M. EST THE PRESIDENT: Fellow citizens: For eight years, it has been my honor to serve as your President. The first decade of this new century has been a period of consequence -- a time set apar

关于希望之星英语演讲稿1 　　Ladies and Gentlemen: 　　“If I could reach higher, just for one moment to touch the sky…”---this is from my favorite song Reach. 　　When we are appreciating the passionate melody of Glori

And that motivates me. 正是这些激励了我. So it's up to you to widen your circle of concern. 你们需要拓宽自己关怀的范围. To care about justice for everybody, white, black and brown. 关心所有人的正义 无论白人 黑人 还是棕色人种. Everybody.