by request的用法和樣例：
例句
- He lined out a few songs upon request.
他應邀演唱了幾首歌曲。 - The professor came to our school to give lectures by request.
教授應邀來(lái)我校講課。 - The bills were introduced by request.
這些議案是應請求提出來(lái)的。 - The Member instituting such export prohibition or restriction shall provide, upon request, such a Member with necessary information.
應請求，設立此類(lèi)出口禁止或限制的成員應向具有實(shí)質(zhì)利益的成員提供必要的信息。
