Ssfs
[医]Single Slice Flow Study
🗣️ 情景例句
He just can't keep a steady job.
他就是不能安心地在一个地方工作。
What are these things doing here?
这些东西怎么会在这里？
If they are not brought to the surface soon they may lose their lives.
如果不把他们尽快救到地面上来，他们就有可能丧生。