这句话怎样改更好一些？

while与but的区别

while conj。 …的时候 While in Vienna he studied music。 他在维也纳时学习音乐。 While he was eating, I asked him to lend me $2。 当他正在吃饭时,我请他借给我二英镑。 While two detectives were keeping guard at the door, two others opened the parcel。 这时两个侦探把着门,另外两个打开包裹。 While I read, she sang。 我看书时，她在唱歌。 I met her while I was at...全部

  while conj。 …的时候 While in Vienna he studied music。 他在维也纳时学习音乐。 While he was eating, I asked him to lend me $2。
   当他正在吃饭时,我请他借给我二英镑。 While two detectives were keeping guard at the door, two others opened the parcel。
   这时两个侦探把着门,另外两个打开包裹。 While I read, she sang。 我看书时，她在唱歌。 I met her while I was at school。 当我在学校的时候我遇见了她。
   虽然；但是 While I understand what you say, I can't agree with you。 虽然我理解你的意思，但我还是不同意。 You like tennis, while I'd rather read。
   你爱打网球，但我爱看书。 (= whilst) but [bEt, bQt] conj。 而是；但是 Not one, but two! 不是一，而是二！ 尽管…还是 tired but happy 尽管累却很快活 可是；然而 I was going to write, but I lost your address。
   我本来要写信的，可是把你的地址弄丢了。 。收起