Perfluorochemical
[机] 全氟化化合物
🗣️ 情景例句
Is that you, Susan?
是你吗， Susan？
A good medicine tastes bitter.
良药苦口，忠言逆耳。
when she remembered that she had gone shopping after the home help had left and she knew that she had turned both keys in their locks,
但突然记起来了，帮手是在她出去买东西之前走的，她还记得曾用了两把钥匙把大门锁上了。