Students in fifty schools are to act as guinea pigs for these new teaching methods.

　　五十所學(xué)校的學(xué)生將作為這些新教學(xué)法的試驗對象。

　　The ceremony was transmitted live by satellite to over fifty countries.

　　典禮通過(guò)衛星向五十多個(gè)國家進(jìn)行了實(shí)況轉播。

　　Fifty pounds is the best I can offer you.

　　我頂多出五十英鎊。

　　I'd say he was about fifty.

　　我猜他五十歲上下。

　　Roughly speaking, we receive about fifty letters a week on the subject.

　　關(guān)于這個(gè)問(wèn)題，粗略地說(shuō)，我們每周能收到大約五十封來(lái)信。