Some animals pant and sweat to speed evaporation of body moisture and thus cool themselves.
A、wiggle摆动slowlyD
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Although the Carbon 14 method of dating old objects is not foolproof , it is the best method available at present
An oversight 遗漏 (miss, overslaugh) in proofreading often results in printed errors.
TheSalkvaccineisamajorfactorinthefighttoeradicatepolio.
In the northeastern United States, it rains intermittently 间歇地 throughout the spring.
Eyespots, the most rudimentary eyes, are found in protozoan原生动物 flagellates 鞭毛虫 , flatworms 扁形虫 , and segmented worms片段 蠕虫 .
