optional造句

We also recommend a full day optional excursion to the Upper Douro.
我们还推荐去杜罗河上游的短途自选一日游。

The course consists of ten core modules and five optional modules.
这门课程包括十个必修单元和五个选修单元。

Certain courses are compulsory, others are optional.
某些课程是必修的,其他是选修的。

相关问题
  • optional造句

    Optional extras include cooking tuition at a top restaurant...可选的额外项目包括在顶级餐厅学习厨艺。The goods are optional, but only one.这些物品是可以任选的, 但只能选一个。Elevation view of a tapered key with optional gib head.具有可选钩头的锥形键的正视图.The third col...
  • optional的反义词有哪些

    optional的反义词有:compulsory, required, compulsory。adj.optional的反义词(随意的;选修的):compulsory。optional的反义词(其他释义):required, compulsory。...
  • optional什么意思解释?

    adj.可选择的,随意的,任意的,非强制的,选修科目...
  • optional的近义词/同义词有哪些

    optional的近义词/同义词有:voluntary, elective, voluntary, elective。adj.optional的近义词(自愿的,志愿的):voluntary, elective。optional的近义词(其他释义):voluntary, elective。...
  • optional的音标

    optional的音标:optional的英式发音音标为:['ɒpʃənl]optional的美式发音音标为:['ɑpʃənl]...
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