给服务员、行李搬运工、导游和司机小费是惯例。It is usual to tip waiters, porters, guides and drivers.这些工作组将按惯例工作。These working parties will be going over well-trodden ground.这条惯例对我们不适用。The convention does not apply to us....
冬天快到了, 我们应该给走廊装玻璃了.Since winter is coming, we should glaze in a porch.我知道怎么给窗装玻璃.I know how to glaze a window.那位装玻璃工人在窗户安装一块新的玻璃片.The glazier fitted a new pane of glass in the window....