Stm
[化] 扫描隧道显微镜
🗣️ 情景例句
This must be a proud day for you.
今天是你值得骄傲的一天。
The weather has been hot so far this summer.
到目前为止，今夏天气一直很炎热。
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。