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abbr. 日本商务改善协会（Better Business Bureau）；血脑屏障
🗣️ 情景例句
It's mostly young people who take part.
参加活动的绝大多数是年青人。
No. I've been in California for the past month.
没有，我刚到加利福尼亚去了一个月。
Let's divide the cake into three.
我们将蛋糕分成三份吧。