以下名詞單復(fù)數(shù)同形：
means(手段) headquarters(司令部)
works(工廠) species(物種)
aircraft(飛機(jī)) Chinese(中國人)
sheep(羊) fish(魚)
中國的計(jì)量單位：li(里), yuan(元), mu(畝)等
實(shí)例：
Every means has been tried out, but without satisfactory results. (每個(gè)方法都試過了，但結(jié)果不令人滿意。)
