The bulk of the ruby rubbish on the pebble bubbles when stirred by bulbed rubber club.
小卵石上的大部分红宝石废料在用有球状突起的橡胶短棍搅动时起泡。
2
Now, the bulk of the world's rubber is grown between 10 N and 10 S of the equator.
现在世界上大部分的橡胶，是生产在赤道南北各10 的之间地带上。
3
Nowadays such heavy belts for outdoor transporting of bulk materials like stone, coal or boulder, are rugged rubber belts with a steel cord traction member.