basic level trade union activities的用法和樣例：
例句
- No one should benefit from the activity of their union without paying dues to it.
任何人如果不支付會費就不應從工會活動中撈取好處。 - It gained the authority to force employers to provide back pay if employees were unjustly discharged because of union activities.
如果僱員因參加工會活動而被無理解僱時，委員會有權迫使僱主支付拖欠的工資。
