Syntan
[化] 合成鞣剂
🗣️ 情景例句
That's relief.
真令人欣慰。
It's not up to his usual standard.
这次没有达到他平时的水平。
Tricycles are lined up on the floor of the pool seven feet under water.
三轮车并排放在7英尺深的游泳池底上。