Isotope number
[电] 同位素数
🧩 词语组成解析
🗣️ 情景例句
And my friend Alexandra is going back to Greece ...
我的朋友Alexandra就要回希腊去了……
Money calls, but does not stay: It is round and rolls sway.
金钱会上门，不会留下来，因为是圆的，所以会滚开。
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。