If you lease an apartment, you sign a contract to live in the apartment for a longer period of time.

假如你长期租用公寓，你得签个合同，以便可以住的更长些。

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Second: with the commissioning agent to sign a contract to establish the rights and obligations of both parties.

第二：与委托方签定经纪人合同，确立双方的权利和义务。

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Consumers are being warned to sign a contract to protect their privacy and their rights before sending their computers off to be repaired.

消费者应该在将他们的电脑送去维修前与维修者签订一份协议来保护自身的隐私和权利。

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In the nineteen forties, Lena Horne was the first African-American in Hollywood to sign a long-term contract with a major movie studio.

VOA: special.2010.05.23

It's illegal, so they can't sign that as a contract, but they they can just agree to do it.

因为是违法的,合同也就无效了,不过他们可以私下达成默契

耶鲁公开课 - 博弈论课程节选

It's illegal to sign an agreement, to sign a contract saying you're going to restrict quantities.

签订这样限制产量的协议,属于违法行为

耶鲁公开课 - 博弈论课程节选

Initially, Russia hoped to sign a contract to deliver its T-50 fighter plane to India, but in the end India insisted on the joint development of a new aircraft, based on the T-50 but with modifications for the Indian Air Force.

BBC: Russia-India arms deal backed by historic ties

Mr Wyatt said he was willing "to sign a contract" to the effect that he and his wife would let Charlotte go if, at the end of five days following a tracheostomy, there was nothing more that could be done.

BBC: NEWS | Health | Don't let baby die, pleads father

One of the player's contemporaries, John Fleck, has agreed on a new deal to remain at Rangers and the club are hopeful that Wilson will sign a contract extension to keep him at Ibrox beyond the end of next season.

BBC: Walter Smith sure speculation won't affect Danny Wilson