训练有素的侦探能通过微表情识别嫌疑人的真实情绪。

A skilled detective can recognize a suspect's true emotions through their ___microexpressions.

虽然他在微笑，但他瞬间的微表情暴露了他内心的不安。

Though he was smiling, his ___microexpressions revealed his hidden uneasiness.