Pterosterone
蝶甾烯酮, 六羟基胆甾烯酮
🗣️ 情景例句
During that time
在那一小时
Look! Lightening has struck the tree and it's on fire.
瞧！闪电划下来，引燃了树木。
Our policy is not to grant exclusivity.
我们的方针是不授与专卖权。