我们植树时，株与株之间留出一定的间隔。
以一定的间隔周期，大约每3个小时，Google分析处理日志文件中的数据。
At some regular interval, approximately every 3 hours, Google Analytics processes the data in the logfile.
该公司还必须搜集由垃圾填埋所产生的甲烷，它在120公顷的范围内按一定的间隔打了1000口井。
The firm also has to collect the methane emitted by the landfill, which has meant sinking 1, 000 Wells at regular intervals across the 120-hectare site.
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