weak mass groups的用法和样例：
例句
- Whether this will set a precedent for many other aggrieved groups is doubtful.
这是否会成为其它许多受过不公平对待的种族的先例尚且无法确定。 - U.S. manufacturers have long complained that Beijing is keeping the Chinese yuan artificially weak, to give its exporters an unfair trade advantage.
美国制造商长期以来一直抱怨中国人为地保持人民币疲软，从而使中国出口商得到不公平的贸易优势。
