动词 “concentrate” 特指 “（无计划地）聚集”；动词 “assemble” 则指 “（有计划地）集合”；动词 “converge” 表示 “（从一处）汇合（到一处）”；而只有动词 “focus” 不能用来描述人群的 “聚合”。 听主持人 Beth 和佳莹讲解这四个词的用法和区别。

Whey product imports totaled 89.9 million pounds, down 26.6%, “Amidst a tense trade war with the U.S.,” says HGD. “Whey ...

U.S. copper futures ended Thursday down more than 22%, by far their [largest single-day drop on record]( ...

Glencore's Horne smelter is facing a charge under the province's environmental laws for allegedly releasing copper ...

Analysts predict that China’s refined copper output will reach an unprecedented level in 2025. The surge in output is ...