Obviously, the impact of such a male contraceptive would go well beyond reproductive biology. 当然了，这样的男性避孕药影响的肯定不只是生殖生物学。 It's interesting to speculate about the effect that it would have on relationsh

So good job. Quest number three. 干得不错！我们来开始第三个任务。 Pick one: Because of the room, fate's really determined this for you, but here are the two options. 任选一项：因为我们都在一个大厅里，这使得我们没选择余地，但有两个选项。 If you're insi

Colin Robertson在Ted英语演讲：一位TED演讲者的噩梦 (中英双语) Today I'm going to talk about unexpected discoveries. Now I work in the solar technology industry. And my small startup is looking to force ourselves int

主办方 NSDA China National Speech & Debate Association，即全美演讲与辩论联盟，是美国历史最悠久、规模最大的中学演讲与辩论荣誉组织，也是世界演讲与辩论领域最大的专业教练会员组织。自1925年成立以来，NSDA累计拥有超过150万学生会员，活动范围遍及全美50个州。仅2016年，就有逾18万中学生会员参加了NSDA举办的各类活动，学习成为批判性思

Hi, everybody. Over the past year, more than 10 million Americans have gained the financial security and peace of mind that comes with health insurance. More than seven million people enrolled in affo