Bdnf
abbr. 脑源性神经营养因子
🗣️ 情景例句
You're a big boy.
你是个大孩子了。
Not only did he make a promise, but he also kept it.
他不仅许下诺言，而且遵守了。
As it is, they have been drilling for sixteen hours and they still have a long way to go.
实际情况是，他们已连续钻了16个小时了，但离钻透还早着呢。