momentum

forward momentum向前的冲力

The wagon gathered/gained momentum [=it moved faster] as it rolled down the hill.下山时，马车越跑越快。

The wagon lost momentum [=it moved more slowly; it slowed down] as it rolled up the hill.上山时，马车越来越慢。

The company has had a successful year and hopes to maintain its momentum by introducing new products.这家公司今年业绩很好，希望通过引进新产品保持这一势头。

The campaign slowly gained/gathered momentum. [=the campaign slowly became more popular and successful]运动的声势越来越大。

The movie loses momentum toward the end.这部电影快结尾时失去了劲头。