Focometry
测焦距术
🗣️ 情景例句
Why don't we take a walk down to the river?
我们何不一路散步到河边去呢？
Thanks for coming to help on such a short notice.
谢谢你临时来帮忙。
As a result of these wars and diseases, the Maori population fell from 100,000 to 42,000.
由于这些战争与疾病，毛利人的人口从100，000人下降到4，200人。