Ants store food, repel attackers and use chemical signals to contact one another in case of attack.

蚂蚁储存食物，击退攻击者，并使用化学信号联系彼此以防被攻击。

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It took teamwork to maintain our defensive line and repel Messi and the Barcelona attack.

团队合作使得我们很好的构建了我们的防线，并有效的遏制了梅西和巴萨的攻势。

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Mr. ANDREW MCBRIDE (former Federal Prosecutor): The Commander in Chief does carry with it the authority to repel invasion or attack, and use certain means to do so: one of which could be the use of military tribunals.

NPR: High Court Hears Challenge to Military Tribunals

The US and other Nato allies have deployed Patriot missile interceptors to repel any possible attack by missiles or aircraft from Syria.

BBC: John Kerry holds talks on Syria crisis in Ankara

They had to repel one Italian attack but could not add any more points of their own and their failure to really put the visitors to the sword means Wales look certain to add the 2008 title to their triumph in 2005.

BBC: SPORT | Rugby Union | France 25-13 Italy