为什么香料在15世纪末期的欧洲如此贵重？Why were spices so highly valued in late 15th-century Europe?19世纪50年代末期，技术变革的速度加快了。In the late 1850s the speed of technological change quickened.这灌木是在这个季节末期才栽种的.The bush was planted late in the season...
The whole gas which is colliding with the oscillator cools off.与振动子碰撞的整个气体将逐渐冷却.The molecules bounce off each other like two colliding billiard balls.当分子相互弹开时就象两个碰撞的弹球.After colliding, both cars turned turtle.碰撞后, 两部车都翻个...
You can pleat palm fronds to make huts, umbrellas and baskets.人们可以把棕榈叶折叠起来盖棚屋, 制伞,编篮子.To pleat or gather ( fabric ) into a ruffle.给(织物)打褶裥,给 ( 织物 ) 饰褶边.Now we're going to pleat the backside.现在我们将要开始制作背后的褶....