在易患心血管疾病、内分泌失调、糖尿病和很多种癌症的人群中，上夜班的工人属于高危人群。
Night shift workers are at higher risk of cardiovascular diseases, endocrine disorders, diabetes and various types of cancers.
科学家们现在正对6000多种青蛙的皮肤分泌物进行甄选，以用于新型抗生素的研究。
The scientists are currently screening skin secretions from more than 6, 000 species of frogs for antibiotic activity.
食肉植物约有675多种，很多都会守株待兔。一株面包大小的捕虫瑾，胶质茸毛，全部展开，引诱昆虫，直至分泌消化液，才合拢。
Many of the world's 675-plus carnivorous species set passive traps. A bun-size butterwort bristles with gluey hairs that ensnare insects until digestive juices do their work.
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