At the extremes是什么意思呢?

At the extremes是什么意思呢? The reasons for these climatic extremes are found in the science of meteorology and should be understood,in broad detail at least,by the hydrologist. at the moment是什么意思 at the minute是什么意思 at the moment是什么意思 at the museum是什么意思 at the irony是什么意思 at the beginning是什么意思? At the zoo是什么意思? at the corner street是什么意思at the corner street是什么意思 at the bus stop是什么意思 at the police station是什么意思 At the next station是什么意思? at the finishing post是什么意思? 文中at the end是什么意思 At the same school是什么意思 at the moment是什么意思啊 at the very heart 是什么意思