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(yàn)對(duì)象。

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

　　典禮通過衛(wèi)星向五十多個(gè)國(guó)家進(jìn)行了實(shí)況轉(zhuǎn)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)問題，粗略地說，我們每周能收到大約五十封來信。