Biosterin
生甾醇
🗣️ 情景例句
Tongue muscles'training is of great importance in learning any foreigh language.
口腔肌肉训练在学习任何语言时都是非常重要的。
May I ask you a question?
我可以向您提个问题吗？
Can you have a look at this?
你能看看这个吗？