例句
Pick a partner and practice passing, for if you pass proficiently, perhaps you'll play professionally.
选择一位队员练习传球，如果你能熟练地传球，你或许会成为一位专业球员。
Foreigners are not expected to use chopsticks proficiently, but if they do, they will give a mighty impression.
外国人不被期望能熟练地使用筷子，但如果他们这样做了，就会有很深的感触和体会。