mark作為斑點(diǎn)可數(shù)嗎

　　例句：

　　She was leading at the half—way mark。

　　賽程到一半時(shí)是她領(lǐng)先。

　　The changing seasons mark the passing of time。

　　寒來暑往，斗轉(zhuǎn)星移。

　　Their predictions turned out to be wide of the mark。

　　他們的預(yù)測后來發(fā)現(xiàn)太離譜了。