练级的英文：
get level
gain level
v. 得到；抓住；获得；受到（惩罚）；说服；到达，来；变得，变成；设法；开始
n. 幼兽；生殖
Get to the bottom of
弄个水落石出
Saving is getting
节约等于收入
It was getting dark.
天色渐暗。
n. 水平线，水平面；高度；层；水平；级别
adj. 水平的，同高度的；笔直的；平静的
v. 推平；毁坏；使平等；瞄准；变平；坦率诚实地对待
Level off the shelves with a spirit level.
用酒精水平仪把架子弄平。
But there is plenty of scope at that level.
然而在此水平上还是有足够的余地。
The worker levelled their looks at the foreman.
工人们用目光逼视着工头。
v. 获得；获利；增加；走快；到达
n. 增加；利润；收获
No pains, no gains.
不劳则无获。
This ticket will gain you admission [will gain admission for you].
这张票将使你得以入场。
Its gain is the product of the gains of its constituent branches.
它的增益等于它含有的分支的增益的积。