These are three sticks of chalk.
好像chalk是不可数名词吧!不能直接说three chalks,需要用一个量词。字典上写的一枝粉笔是a stick of chalk,那三枝就是three sticks of chalk:)
These are three sticks of chalk.
好像chalk是不可数名词吧!不能直接说three chalks,需要用一个量词。字典上写的一枝粉笔是a stick of chalk,那三枝就是three sticks of chalk:)