Yesterday was sunday
昨天是星期天
🧩 词语组成解析
was
[[wɔz, wəz]]
be的过去式
🗣️ 情景例句
Don't drink the tap water.
别喝自来水。
I'm not in the mood.
我没心情。
This is because they had no natural enemies until the arrival of humans and therefore did not need to develop flying wings.
这是因为人类到达这里之前，这些鸟没有天敌，因此，它们不需要发育飞行的翅膀。