Lichees and pineapples are close to unit price elasticities among summer fruits.夏季水果自身价格弹性中仅荔枝及凤梨接近单一价格弹性.Oranges and watermelons have the relatively higher expenditure elasticities among winter and summer fruits, respec...
Frogs eat pests which destroy crops and carry diseases.青蛙吃破坏庄稼、传播疾病的害虫。He doesn't spray against pests or diseases.他并不喷药防虫祛病。Rodents carry diseases and are generally regarded as pests.啮齿目动物传播疾病,常被当作害虫对待....
Precipitates are usually collected by centrifugation at intervals.常常是用离心法分段收集沉淀的.Try to get into the habit of eating at least three small meals a day, at equally spaced intervals.尽量养成每天至少吃3顿小餐的习惯，而且每餐的间隔要相同。She began to ...
And the fiddler played another little tune.小提琴手又演奏了一首短曲。The fiddler crab is a living clock.招潮水蟹是一只活闹钟.The fiddler's crude and irreverent sense of humor was distasteful to him.拉琴人的粗鲁无礼的幽默感使他讨厌....