Isogams
等重力线, 重力等差线
🗣️ 情景例句
Is he OK?
他还好吗？
You'll break it, if you don't take care.
你不专心的话，就会打破。
I don't understand! What do you mean? asked Mrs Brown.
“我不懂！你说的是什么意思？”布朗夫人问道。