这袋面粉重5磅。

This bag of flour weighs 5 ___lb.

周末派对上DJ放了很多L.B.的音乐。

The DJ played a lot of ___L.B. at the weekend party.

这个中队的轻型轰炸机完成了精确打击任务。

The ___LB squadron completed a precision strike mission.