by free和for free区别
来源:魅力女性吧 1.15W
by free:
通过免费的
Today, this initiative has been superceded largely by free WiFi access because people buy more and more laptops.
如今,这一举措在很大程度上已被免费 WiFi 访问取代,因为人们购买越来越多的笔记本电脑。
for free:
免费
Are the meals for free?
这些饭是免费的吗