center-of-gravity rule 重心规则
gravity rule
重力规则
以上为机器翻译结果，长、整句建议使用 人工翻译 。
When asked why the British embassy had not been withdrawn, Mr Hague said that he did not rule it out given the "gravity of the situation" but that "our embassy is not involved in killing people".
BBC: Hague: 'Deeply frustrating' situation in Syria
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