不时: frequently; from time to tim ...每: every; each; per隔: partition; separate一段时间: a period of time或: nǎi-.距离: distance; range; gap; space; ...每隔一段时间: at predefined intervals; at set intervals; atsetintervals; every once in a while不时，每隔……时间（距离）: at intervals每隔一会儿, 每隔一段距离: at intervals每隔一会儿，每隔一段距离: at intervals每隔一段时间改为耕地的草地: ley每隔一定时间(距离): at regular intervals隔一段距离: at a distance每隔一定时间: at fixed intervals; at regular intervals过一段时间: in on time名词] 一段时间: period时段, 一段时间: period of time停一段时间: in accident一段时间: a piece of time; for a spell; for some time; hour; lapse; period; session noun; space; span; stitch一段时间前: by the time在一段时间: for a space招致，一段时间: spell每隔一定的距离: from space to space不时, 相隔一定距离: at intervals不时；相隔一定的距离: at intervals
