但是，气候条件存在波动，造成干湿天气交替，以致可以获取的动植物数量忽高忽低。
There were, however, fluctuations in the climatic conditions, with the consequences that wet conditions were followed by dry ones, so that the availability of plants and animals oscillated brusquely.
情绪忽高忽低。
体温忽高忽低，身体变黄。
High body temperatures return and the body turns yellow in color.
我持着弓忽高忽低。
但这种情绪忽高忽低的突然转变使特拉·德尔很是吃惊。
I realized that the Micawbers had not changed at all, but this quick change of mood was rather a surprise for Traddles.
等他开始唱起那些悠扬婉转、忽高忽低的歌曲时，跟得上的人就剩下不多了。
When he begun sang those melodious 1 and rising and falling songs, few people could still join in the singing.
忽隐忽现、忽高忽低穿梭而过，观众也随之进入江河大海的意境之中，感受到“如鱼得水”的愉悦。
The indistinct fish at a high or low position seem to bring people to rivers or the sea. People feel great pleasure.
忽隐忽现、忽高忽低穿梭而过，观众也随之进入江河大海的意境之中，感受到“如鱼得水”的愉悦。
The indistinct fish at a high or low position seem to bring people to rivers or the sea. People feel great pleasure.
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