美国确实有一项明确的家庭政策，即1993年通过的《家庭医疗休假法》。

The United States does have one explicit family policy, the Family and Medical Leave Act, passed in 1993.

youdao

现在，我们确实有明确的证据表明，人们正在以一种以前不可能的方式发展友谊和专业网络，而且这个过程发展得更快了。

Now, what we do have clear evidence for is that people are developing friendships and professional networks in a way that wasn't possible before, the process is faster.

youdao

实际上，斯金纳也确实明确地，对物种的自然选择，同行为的自然选择进行过类比。

And in fact, Skinner explicitly made the analogy from the natural selection of species to the natural selection of behavior.

youdao

And in fact, Skinner explicitly made the analogy from the natural selection of species to the natural selection of behavior.

实际上，斯金纳也确实明确地,对物种的自然选择,同行为的自然选择进行过类比。

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