Widespread epidemics in birds increase opportunities for human exposure.禽类中的广泛流行增加了人类暴露的机会.The epidemics usually stop when the summer rainy season begins.时疫通常在夏季雨季开始时停止传播....the protection of mankind against the forces o...
边界清楚的岩脉, 岩床及岩瘤等都常见.Sharply outlined dikes, sills and bosses occur in numbers.岩脉总体型式可以作理论模似.The gross pattern of dikes can be duplicated theoretically.这是与小岩脉群有关的准经济意义的矿化.This is subeconomic mineralization related to minor...
Snow is sometimes found all summer long upon the highest peaks.有时候山峰上整个夏天都有积雪。...the snow-capped Himalayan peaks.覆盖着皑皑白雪的喜马拉雅山峰The business cycle is a series of peaks and troughs.商业周期是一系列的高峰期和低谷期。...the snow-covered peak...