Dcf
[医] 直接离心浮选[法]
🗣️ 情景例句
The main course: steak and potatoes.
主菜 牛排和马铃薯。
What were you doing when I called?
我打电话给你时你在干吗？
Little by little the eleven minutes fell to zero.
慢慢地从11分钟减到了零。