天然: natural; native; living 短语和例子天然产物 be made by nature; 中国无产阶级和广大农民有天然的联系。 the chinese proletariat has natural ties with the peasant masses.; 天然宝石 [宝] natural gemstone; 天然播种 self-sowing; 天然采光
绝缘: 1.[电学] (隔断电流) insulation; isolation; insulate; isolate 短语和例子请检查一下我屋子里电线的绝缘情况。 please examine the insulation of the electric wires in my house.2.(跟外界不发生接触) be cut off from; be isolated from
