间或;
Bed load particles move spasmodically, perhaps at long intervals, and are at rest on the stream bed most of the time.
推移质颗粒多半作间歇运动,而大部分时间则停歇在河床上。
The terror had at long intervals given place to a feeling of an almost ineffable sweetness.
这种胆战心惊的感觉就偶尔让位给一种简直说不出的甜蜜的感觉了.
The breath heaved his chest at long and irregular intervals.
他的呼吸,忽长忽促,胸膛随着起伏。
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