研制了一种性能优异的易切削铋黄铜来替代有毒的铅黄铜.An environmental friendly Bi - brass with cutting - free and excellent properties was developed to substitute for Pb - brass....
My mother became too ill to work and I began to do chores in the neighbourhood.妈妈病得不能上班了,我就开始在街坊里干些零碎事儿.Now Charlie knows that all BINGO Kids have to do chores.现在查理知道了,所有的宾果孩子们都要做家务....
a Heath Robinson contraption复杂而不实用的装置Few kinds of plants grow in the heath.少有植物可在荒地上生长。Legumes ( family Fabaceae ) may also be common components of heath floras.一些豆类 ( 义的豆科 ) 可能是石楠区系的常见组分.Heath's appeal against the ...