The highest positive rate of rv was observed in summer and autumn, while that of Shigella was noted in winter and spring.
冬春季轮状病毒阳性率最高，而夏秋季志贺菌阳性率最高。
That’s been observed twice before, when comet Shoemaker-Levy 9 crashed into Jupiter in July 1994, and when a large asteroid smacked the planet last summer.
这种黑羽碎片的现象已经观察到了两次了，一次是苏梅克-列维9彗星于1994年7月撞向木星，另一次是去年夏天一个比较大的小行星于撞击了这个行星。
The average rose in both summer and winter, which is unusual as most of mountain warming has previously been observed in the winter.
冬夏两季平均气温的上升幅度和此前冬季对多数山峰变暖的数据比较，结果有很大的不同。
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