- 推荐网络例句
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PURPOSE: To analyze the effect of topical anesthetics in taking dental X-ray film.
目的：评价表面麻醉剂在根尖片拍摄中的使用效果。
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He watched oat seedlings warn each other of danger by releasing jasmonate acid, and tracked the dropping of poisoned leaves by the Sonoran brittlebush to ward off competition.
他观察到燕麦秧苗通过释放茉莉酮酸酯来互相提醒危险，并追踪凋落的被索诺兰矮灌木毒害的叶子的踪迹，以避开竞争。
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Australia has a strong mine safety record compared with many other countries.
同其它国家相比，澳大利亚有着良好的矿井安全记录。
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