optional什么意思解释？

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

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。...

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 opti...

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...

emolsifier的音标：emolsifier的英式发音音标为：[ɪ'mɒlsɪfaɪə]emolsifier的美式发音音标为：[ɪ'mɒlsɪfaɪə]...

She stood up quickly, giving a little cry of astonishment.她迅速站了起来，惊叫了一声。"What?" Meg asked in astonishment.‘什么？’梅格惊讶地问道。She is wide-eyed with astonishment.她吃惊地睁大了眼睛。...

scoff的一般过去时为：scoffed...

acoradiene的音标：acoradiene的英式发音音标为：[əkɒ'reɪdɪən]acoradiene的美式发音音标为：[əkɒ'reɪdɪrn]...

The ransom must proportion the losses we have borne.赎金必须相当于我们所遭受的损失。Job losses are speeding up...失业趋势正在不断加快。Two of the world's top four computer manufacturers have announced a shotgun wedding prompted by slumping sa...

The realization tactic of median filter, emendating incline, outline pick - up arithmetic is designed.设计了图像中值滤波 、 倾斜校正 、 轮廓提取算法的实现策略....

粘液闭止...

chambray的音标：chambray的英式发音音标为：['ʃæmbreɪ]chambray的美式发音音标为：['ʃæmbreɪ]...

He conducted the two animals to a long room that seemed half bedchamber and half loft.他领着两只动物来到一间长长的房间,一半像卧室,一半像贮藏室....the royal bedchamber.寝宫The products include the hall furniture , and bedchamber furniture series.产品设计...

mainsail的音标：mainsail的英式发音音标为：['meɪnseɪl]mainsail的美式发音音标为：['mensəl, -ˌsel]...

“马雷斯”的英语可以翻译为：[人名]Mares...

“字母的”的英语可以翻译为：abecedarian，alphabetic，alphabetical，literal ...

He was very resentful of their success.他对他们的成功愤愤不平。At first I felt very resentful and angry about losing my job.起初我对丢掉工作感到非常怨恨和恼怒。He felt deeply resentful towards his ex-wife.他对前妻怨恨极深。They're resentful that outsider...

wining的音标：...

adj.不自然的，勉强的，人为的，非天然的...