Davidsonite
绿柱石
🗣️ 情景例句
Hobbies are supposed to be relaxing.
业余爱好应该是令人放松的。
We exchange products under almost all circumstances.
在各种情形下我们都可更换产品。
Insects would make it impossible for us to live in the world;
要不是人类受一些食虫动物的保护，昆虫就会使我们无法在地球上生活下去，