Preserve grading in these areas to protect grass seed mixtures planted in the exposed region.保护种植在开阔地的绿化地带.The grading capacitor chiefly consists of body, metal expanders, impregnant and porcelain bushing.断路器电容器由器身 、 扩张器...
...an arithmetic test.算术测验John was competing against James for the prize in arithmetic.约翰和詹姆斯比赛争夺算术奖.Using Greek sources, he compiled in Latin selections from elementary treatises on arithmetic, geometry, and astronomy.他...