伦道夫的著作专门论述污染对健康的影响。Randolph's work was exclusively concerned with the effects of pollution on health.《牛津化学初级读本》丛书旨在论述有机化学中的重要问题。The Oxford Chemistry Primers aim to cover important topics in organic chemistry.书中的有些论述...
保持放松、直立的坐姿。Sit in a relaxed upright posture.他那直立的头发和咧着嘴的笑容使他更像个厚脸皮的家伙。His cheeky chappy image is reinforced by the spiky hair and the wide grin.荒原上一些直立的石块是古老宗教的遗迹.Some upright stones in wild places are the vestige of anc...