Hca
[医][=heart cell aggregate]心脏细胞聚集
🗣️ 情景例句
Sorry, I just like to watch almost all kinds of ball games. I'm strictly spectator.
对不起，我仅仅喜欢观看几乎所有的球类比赛，我是个十足的观众。
No. Can't you see that rocket is almost falling down.
不。你不知道火箭快要倒下来了吗？
It was the idea of supporting a craft on a 'pad',or cushion, of low-pressure air, ringed with a curtain of higher pressure air.
用一个气垫来支撑船体，低压空或软垫，软垫周围用高压空气环绕。