for free

(informal)without cost or payment

(非正式)免费地，无偿地

these professionals were giving their time for free.

这些专业人员在抽时间提供无偿服务。

free and easy

informal and relaxed

随便的，无拘无束

free, gratis, and for nothing

(humorous)without charge

(幽默)不收费地

a free hand

freedom to act at one's own discretion

自行处理权；自主权；全权；放手干的权力

free on board (或 rail)

(缩略词: f.o.b. 或 f.o.r.)including or assuming delivery without charge to a ship or railway wagon

离岸价格；船（或火车）上交货；装船（或装火车）免费

(a) free rein

a free ride

used in reference to a situation in which someone benefits without having to make a fair contribution

占便宜；无本获利，白得

people have been having a free ride, paying so little rent that there is no money for maintenance.

人们一直在占便宜，只付很少租金以至于没有钱搞维修。

the free world

the non-communist countries of the world, as formerly opposed to the Soviet bloc

自由世界（统指以前反对苏联集团的非共产主义国家）

it's a free country

said when asserting that a course of action is not illegal or forbidden, often in justification of it

这里是自由国家（用于声称做某事不违法或不受禁止，常有辩解之意）

make free with

treat without ceremony or proper respect

擅自处理；随意对待

he'll have something to say about your making free with his belongings.

你擅自动用他的个人财物，他有话要说。

for free【非正式用语】

Without charge.

免费的