The divers began preparations at dawn and soon afterwards, when all was ready, the steel ball disappeared under the surface of the water.
天刚破晓，潜水员们就开始准备，不久，一切准备就绪，钢球就在水面上消失了。
Topical preparations of devil's claw are also applied to the surface of the skin to heal sores, ulcers, boils, and skin lesions.
外用制剂魔鬼爪也适用于表面的皮肤愈合溃疡，溃疡，归根结底，和皮肤损伤。
Mice infected by different preparations via oral cavity and injection revealed symptoms on the epithelial surface and the pathologic changes in the viscera. The results show that t...
并用不同剂型口服和注射感染小白鼠，观察了其体表症状及内脏病理变化，结果表明：该杀虫剂不引起致突变作用，对人畜是安全的。
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