Is English an optional lesson, or compulsory one?

英语是选修课还是必修的课程？

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There are two arbitration forms in American ADR, the traditional one and the compulsory one annexed to court.

在美国ADR中有两种仲裁形式：一种是历史悠久的传统型仲裁，另一种是近年来兴起的法院附设强制仲裁。

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Each division elects one member using compulsory preferential voting.

每个部门采用强制偏好投票来选举一个成员。

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The federal mandate transformed a voluntary expense into a compulsory one, increasing demand exponentially.

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If the unemployed refused to search for a job, or to take the compulsory one, their unemployment benefit was halted.

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School group example: If you could swap one compulsory lesson for another subject, what would you do?

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