The car slowed down as they passed Customs. [VERB PREP.]

过海关的时候，车速慢了下来。

There is no cure for the disease, although drugs can slow down its rate of development. [VERB PREP. noun]

尽管药物可以减缓病情的发展，但是这种病仍然是不治之症。

Damage to the turbine slowed the work down. [VERB noun PREP.]

涡轮机的损坏降低了工作的效率。

You will need to slow down for a while. [VERB PREP.]

你需要放松一段时间。

He was still taking some medication which slowed him down. [VERB noun PREP.]

他仍然在服用能够让他放松下来的药物。