whipsawn

操作双人拉切锯

To operate a whipsaw.

使交易者两头受损

To cause (a trader) to lose potential profit by buying shares just before the price falls, or by selling them just before the price rises.

同时以两种方式击败某人

To defeat someone in two different ways at once.

工会以其他雇主已让步为由迫使雇主屈服

Of a trade union: to coerce employers into capitulating by bringing them the news that other (more easily convinced) employers have already done so.