There's a great deal of suspicion and fear, and it's hard to say when all of this will simmer down. [VERB PREP.]

人们疑心重重，惶恐不安，很难说这一切什么时候会平息下来。

Ginny's initial rage at his treatment of Chris had simmered down to resentment. [V P to n]

他对待克里斯的态度最初让金尼感到无比愤怒，后来慢慢转变成了怨恨。