许多人认为，蝶泳是一种上下起伏运动，其实不是。
So a lot of people think of butterfly as some kind of up and down movement.
通过采用雷达和激光来观测附近船舶和波浪的运动，数控吊车可以精确的预先判断出船舶的起伏位置，从而采取相应的反应。
By measuring the motions of nearby waves and vessels with radar and lasers, the software running a crane can predict exactly how a ship will be pushed, and react accordingly.
这幅中国早期作品中丝毫没有生硬之处，因为画中特别喜欢使用起伏的线条，这就赋予了整个画面一种运动感。
There is nothing rigid in this early Chinese work, because the predilection for undulating lines imparts a sense of movement to the whole picture.
应用推荐