Several red and white barriers marked the road at intervals of about a mile.
每隔1英里左右就有一些红白相间的路障来标示道路。
We take a rest at intervals of two hours.
我们每隔两小时休息一次。
Trees are planted at intervals of three feet in this area.
在这个地区每隔三英尺种着一棵树。
Trees are planted at intervals of three feet in this area.
在这个地区每隔三英尺种着一棵树。
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