铜的供给很难增大，所以其价格增长势头很大。

The momentum of copper, whose supply is harder to ramp up, looks more resilient.

youdao

抛开统计因素不谈，即使劳动生产率获得提高，面对美国经济身上日益增大的压力，经济产出仍有可能无法维持目前良好的增长势头。

Statistics aside, it is also possible output won't hold up under the pressures building against the U. S. economy, even with better productivity.

youdao