谈判达到了一个关键节点，双方必须在此妥协。
The negotiations reached a critical point at which both sides had to compromise.
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at英 /æt/|美 /æt/
Which英 /wɪtʃ/|美 /wɪtʃ/
解释
at which 是介词 at 与关系代词 which 的组合，which 指代 a critical point。at 表时间节点，前置后构成正式语体。非正式说法为 a point which both sides had to compromise at。
The negotiations reached a critical point at which both sides had to compromise.
at which 是介词 at 与关系代词 which 的组合，which 指代 a critical point。at 表时间节点，前置后构成正式语体。非正式说法为 a point which both sides had to compromise at。