Dictamnin
[化] 白藓碱
🗣️ 情景例句
We can write letters. It's cheaper than calling.
我们可以写信就好，那比打电话便宜。
A mean boy teases the dog.
一个淘气的男孩在捉弄着狗。
Only the Earth provides ideal conditions, and even here it has taken more than four billion years for plant and animal life to evolve.
只有地球提供理想的条件，而即使在这里，植物和动物的进化也用了40亿年的时间。