他们在哪里举行他们的党派大会？
Where are they holding their party ___convention?
在许多国家，葬礼上穿黑色是习俗。
In many countries it is the ___convention to wear black at funerals.
打破惯例，公司在户外举行了年度会议。
Breaking with ___convention, the company held its annual meeting outdoors.
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