Mesoplasm
中胚层质
🗣️ 情景例句
It's good to see you so happy.
能看见你如此高兴 ，太好了。
He must have been an outstanding student.
他一定是个优秀学生。
It is impossible to make more than the wildest guess at how many they kill, but they are hungry creatures, not content with only three meals a day.
它们一年中消灭了多少昆虫，我们简直无法猜测，它们是吃不饱的动物，不满意一日三餐。