The two parties involved in a contract have the obligation to execute the contract.

合同双方有义务履行合同。

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The means of payment is an important decision that has to be made by the two parties involved in the corporate merger.

并购支付方式的选择是并购活动中并购双方必须面对的决策。

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Communicative context covers both the two parties involved in communication and their psychological worlds, social communication worlds and physical worlds.

语境关系中的交际语境包括交际双方及其心理世界、社交世界和物理世界。

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So, in cases where Hon Hai makes an Android-powered smartphone, tablet, camera or television for a customer who has already signed a patent deal it will be up to the two parties involved to agree how the charge should be divided up.

BBC: Foxconn factory

Nevertheless, even with all parties involved, two big questions remain.

ECONOMIST: Northern Ireland

Beyond that, I'm not sure if really things will change a lot because we have too many interests involved, two parties joining into a coalition that has actually fought against each other in the election campaign for weeks.

NPR: Merkel Claims Top Job in German Government