Detelectasis
膨胀不能, 萎陷
🗣️ 情景例句
He emphasized that Marxism was scientific truth.
他指出马克思主义是科学的真理。
Does the back door have a lock on it?
后门上有锁吗？
Tie a heavy weight at the end of a long piece of string.
把一个重物拴在一根长绳子的一端，