It has reduced mortality rates and prolonged the average length of life, thus multiplying population figures.
它减低了死亡率,延长了人的生命期,因而使人口倍增;
His life is about ten-thirty years, in the absence of accidents, the average length of life with small dogs.
其寿命约为十-三十多年,若无发生意外,平均寿命以小型犬为长。
英语巴士 · 英语词汇