free-will

adj voluntary 自愿的: a free-will offering 自愿的提供.

free port, free speech, free trade, free verse, free vote, free wheel, free will, free-for-all, free-hand, free-handed, free-lance, free-liver, free-living, free-load, free-loader, free-range, free-standing, free-style, free-thinker, free-thinking, freebie, freedom, freedom fighter, Freefone, freehold, freeholder, freelancer, freely, freeman, Freemason, Freemasonry, Freepost, freesia, freethinker, freeway, freewheel, freeze, freeze over, freeze up, freeze-dry,