Bulldozers piled up huge mounds of dirt. [VERB PREP. noun]
推土机推积起大堆大堆的泥土。
Mail was still piling up at the office. [VERB PREP.]
办公室里的邮件仍在往上堆。
Problems were piling up at work. [VERB PREP.]
工作中的问题越积越多。
He piled up huge debts. [VERB PREP. noun]
他债台高筑。
...a 54-car pile-up.
一起54辆车相撞的事故
See also: pile up
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