If a process or movement gains momentum, it keeps developing or happening more quickly and keeps becoming less likely to stop.
例句
This campaign is really gaining momentum...该运动的势头越来越猛。They are each anxious to maintain the momentum of the search for a solution.他们每个人都迫切希望能一直劲头十足地去寻求解决方案。
N-UNCOUNT
(物理学中的)动量，冲量
In physics, momentum is the mass of a moving object multiplied by its speed in a particular direction.
英汉词典释义
n.
动力;推进力; 势头
The style prevails and picks up momentum.这式样很流行, 而且越来越流行。
〈物〉动量
The sledge gained momentum as it ran down the hill.雪橇从山上下冲时的动力越来越大。
英英词典释义
Noun
1. an impelling force or strength;
"the car's momentum carried it off the road"
2. the product of a body's mass and its velocity;
"the momentum of the particles was deduced from meteoritic velocities"