除草剪刀；专门用于修剪缝隙角落里的青草。Grass shears are specially made to trim grass growing in awkward places.他们把他的除草机全都推到外面丢掉了。They trundled his mowers outside and dumped them.她教我除草。She taught me to do the weeding....
A curved-inwards wall has a convergent effect on wall spray.凹型壁面对碰壁喷雾有聚集作用。We shall study a very particular kind of sequences, called convergent sequences.我们将研究称为收敛数列的很特别的一类数列.The finite - difference computation must be ...
我从十四岁时起就不得不照料自己.I've had to fend for myself since I was 14.一队学生鱼贯而入, 共有十四五个人.A group of students filed in, fourteen or fifteen all told.二十四 小时为一日.Twenty - four hours make a day....
The folate concentration increased significantly while the homocysteine concentration decreased significantly.另含富马酸亚铁及葡萄糖酸亚铁,容易被人体吸收.They concluded that folic acid lowers the concentrations homocysteine in the blood.他们的结...