P点和Q点分别表示该质点的两个位置.Points P and Q represent two positions of the particle.碰撞并不往往使质点减速.Collisions need not always act to slow particles down.我们可标记占据某个小领域的质点群.We label a group of particles occupying a small neighbourhood....
Are there any perks that go with your job?你的工作有什么津贴 吗 ?The boss'son got a cushy job with many perks.老板的儿子趾高气昂地得到一件软差事.Perks offered by the firm include a car and free health insurance.公司给予的额外待遇包括一辆汽车和免费健康保险。He perks...
Any atlas , containing many pages of maps, normally includes an index, called a gazetteer.任何载有多幅地图的地图集, 一般都附有一份地名索引.Gazetteer South America: Amazon , Orinoco, and coastal river drainages of the Guianas.南美洲: 圭亚那的亚马逊河, 奥里诺...
用贝壳来装点盒子、托盘、镜子甚至是花盆。Use shells to decorate boxes, trays, mirrors or even pots.花坛和花盆里种满了夏令花草。Flowerbeds and tubs are banked with summer bedding plants.把植物从花盆里倒出来。Turn the plants out of their pots....
Wright managed a shot but it grazed the near post and rolled harmlessly across the goal.赖特勉强起脚射门，但是球擦着近门柱有惊无险地偏出了球门。Thousands of meteorites penetrate Earth's atmosphere and fall harmlessly to the ground each year.每年...
The only sound was the crackle of breaking ice.唯一的声响是冰层噼噼啪啪碎裂的声音。We heard the rapid crackle of automatic gunfire.我们听到自动枪炮发出快速的射击声.The crackle of the envelope in his hands was loud.信封拿在他手里发出很响的沙沙声....