Add 20 mg. of diatomaceous earth filter aid per liter of solution.对每升溶液加入20毫克硅藻土助滤剂.Acid - washed, flux - calcinated diatomaceous earth is often used.通常使用酸洗的, 通量煅烧硅藻土.Diatomaceous earths are the skeletal remains of the t...
很多少年打零工帮补家里维持生计。A lot of the lads took small jobs to help keep the wolf from the door.他打零工老老实实挣钱.He's doing odd jobs to turn an honest penny.那个男孩在杂货店打零工.The boy works part - time at the grocery....
这时车已徐徐的转出大门.The road was jammed with rickshaws at the hospital gate.有的还未厌倦那船一样的徐徐的划行.Some had not yet wearied of their gentle boat - like paddling.天气很温暖而且微风徐徐的.The weather is warm and breezy....