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。
The bulk of the ruby rubbish on the pebble bubbles when stirred by bulbed rubber club.
最常见的空间是那些由松散的、未固结的砂和砾石组成的颗粒（沙粒和小卵石）之间的空间。
The commonest spaces are those among the particles—sand grains and tiny pebbles—of loose, unconsolidated sand and gravel.
有时一块小卵石就足以使冰山崩裂。
SOMETIMES it takes but a single pebble to start an avalanche.
应用推荐