例句與造句

1. :: : : : At a much higher level, for those who are interested, we're saying that the real projective line bundle over the circle ( that is, the M鯾ius strip ) has no nonzero Tesseran 07 : 13, 26 October 2006 ( UTC)
2. It's difficult to find projective line bundle in a sentence. 用projective line bundle造句挺難的