A tripod will be useful to align and steady the camera.三脚架有助于调准和稳定相机。When stalking subjects, a tripod is impractical.潜步跟踪目标时，用三脚架是不切实际的。Make sure the tripod is stable.一定要把三脚架放稳....
看不见的手的效能必然要相应地降低.The virtues of the invisible hand must be that much discounted.然而, 它不需要被吸收的水汽层来发挥效能.However, it does not require an absorbed vapour layer to become effective.我昨天询问过该新机器的效能.I asked about the efficiency of...
语言污秽，暴力场面非常写实。The language is foul and the violence horribly realistic.公共场所的肮脏污秽让我感到非常悲哀。I find public squalor very saddening.编辑因刊载污秽文字而被起诉。The editors are being prosecuted for obscenity....