植物茎往上长时表现出负向地性.The main stems of a plant show negative geotropism as they grow upwards.根系向地性变化可由缺磷等因素所诱导, 且存在著一定的遗传变异性.Root gravitropic responses are adaptive , inheritable traits induced by low phosphorus availability a...
一位推着手推车的侍者紧随着他过来。In his wake came a waiter wheeling a trolley.成功合并两家银行需要坚决快速地着手解决费用问题。Successfully merging two banks requires a fast and ruthless attack on costs.汽船向我们嘟嘟鸣笛时，甲板上的水手们饶有趣味地挥着手。Steamers tooted at us as sailor...
prehistoric hunters and gatherers史前的狩猎者和采集者The brazil nut gatherers were paid only 2 to 3 percent of the New York wholesale price.这些巴西果采摘者所卖的钱仅为纽约批发价格的2%到3%。The earliest people were roving hunters and gatherers who made ...