乱收费的英文：
illegal charges
arbitrary collection of fees
arbitrary fee collection
indiscriminate collection of contributions

参考例句：

impose unjustifiable charges; Arbitrarily,impose(extra)fees; collect questionable or unauthorized fees
乱收费

Impose arbitrary quotas and unjustifiable charges
乱摊派，乱收费

Unwarranted pooling of funds,arbitrary requisition of donations and exaction of fees from enterprises
乱集资、乱摊派、乱收费

illegal是什么意思：
adj. 违法的
n. 非法移民

They are illegal immigrants.
他们是非法移民。

Illegal immigrants or workers are sometimes referred to as illegals.
非法移居的移民或工人有时也被称为非法移民。

It is illegal to drink underage in America.
在美国，未到年龄喝酒是违法的。

charges是什么意思：
n. 费用；电荷；掌管；控告；命令，指示；指责
v. （使）充电；使承担；指责；装载；索价；向前冲；控告；把...记入帐册

charge the enemy
向敌人冲去

mileage charges
按英里程计算的运费

What is this charge for?
这项费用是什么？

arbitrary是什么意思：
adj. 任意的；武断的；随心所欲的；专横的

This is an arbitrary decision.
这是个武断的决定。

Dictators are arbitrary rulers.
独裁者即独断专横的统治者。

My choice was quite arbitrary.
我的选择相当随意。