Olefins
n. 烯烃; 链烯
🗣️ 情景例句
Keep cool.
保持冷静。
Imagination is the source of creation.
想象是创作之源。
I've just arrived myself so forgive me if I don't seem to know what's going on.
我自己也刚到家。所以，如果我不了解情况的话，那么请你原谅。