These functions are similar in style to the rest of the functions except they open and close tags that generally can have a few to several nested elements.
这些函数与其他函数在风格上类似,只是前者打开和关闭的标记通常有一些嵌套的元素。
They range from a few days for small lakes up to several hundred years for large ones; Lake Tahoe, in California, has a residence time of 700 years.
它们从小湖的几天到大湖的几百年不等;加州的太浩湖有700年的滞留时间。
When the water level was high, the user needed only to descend a few steps to reach it; when it was low, several levels would have to be negotiated.
当水位高的时候,使用者只需要往下走几个台阶就能到达井的部位;当水位低的时候,就要走好几层了。
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