兹事体大，汉语成语，拼音是zī shì tǐ dà，意思是指这件事性质重要，关系重大。出自《典引》。
本周，华尔街可谓是兹事体大。
但以色列方拒绝此安排，声称为谈判设置条件兹事体大。
But Israel had rejected that, saying it amounted to placing conditions on the negotiations.
但以色列方拒绝此安排，声称为谈判设置条件兹事体大。以色列一直要求美国单独提出邀请。
But Israel had rejected that, saying it amounted to placing conditions on the negotiations. Israel had been demanding a separate invitation from the U.S..
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