It can improve our grades

提高───increase

The sudden increase in sales is easily explicable.───销售额的突然增加是很容易理解的.

an increase in postage rates───邮费的增加

The Chancellor is on record as saying that the increase in unemployment is "a price worth paying" to keep inflation down.───财政大臣公开宣称失业率上升是遏制通货膨胀“值得付出的代价”。

Sugar is added to the wine during fermentation to increase the alcohol level.───发酵时在葡萄酒里加糖以提高酒精浓度.

Working at the sharp end, many of us have noted an increase in the number of patients attending surgeries.───从事一线工作，我们很多人已经注意到来做手术的病人越来越多。

We should increase production and practise strict economy.───我们应当增加生产,厉行节约.

These nests increase in size each year, and can eventually weigh down the branch.───这些巢每年都在变大，最终可能会把树枝压弯。

While the increase in homicides is alarming, it is nothing compared to what is to come in the rest of the decade.───虽然凶杀案的增加令人担忧，但和这个十年里接下来的几年将要发生的事相比却是小巫见大巫了。

an alarming increase in crime───犯罪活动骇人的增加

The union had sought a wage increase and a shorter work week.───工会寻求增加工资，缩短每周工作时间。