音標(biāo)發(fā)音英式音標(biāo) ['?p?(?)n(?)l]美式音標(biāo) [?ɑ?p.??n.?l]國(guó)際音標(biāo) ['?p??n?l]英式發(fā)音 美式發(fā)音 基本解釋adj. 可選擇的,隨意的詞根記憶option(選擇) + al→可選擇的opt(選擇) + ion + al→可選擇的同根派生adv性質(zhì)的同根詞optionally:隨意地。n性質(zhì)的同根詞option:[計(jì)]選項(xiàng);選擇權(quán);買(mǎi)賣(mài)的特權(quán)。vi性質(zhì)的同根詞opt:選擇。optional相關(guān)詞英漢例句用作形容詞 (adj.)用作定語(yǔ): ~+ n.Chinese is our optional course to us students of science.中文是我們這些理科學(xué)生的選修科目。用作表語(yǔ): S+be+~The goods are optional, but only one.這些物品是可以任選的,但只能選一個(gè)。optional更多例句詞組短語(yǔ)用作形容詞 (adj.)~+名詞optional course 選修課,選修課程短語(yǔ)optional package 可選包;廠商選擇性實(shí)現(xiàn)包;廠商選擇性實(shí)現(xiàn)套件optional stipulation 選擇性規(guī)定;可選擇的契約條款英語(yǔ)Optional transitive 選項(xiàng)轉(zhuǎn)移類;可選過(guò)渡;選項(xiàng)性轉(zhuǎn)移類;可選傳遞OPTIONAL COLOR 可選色系;可選顏色;可選色彩optional fee 選港費(fèi)optional更多詞組英英字典劍橋英英字典 If something is optional, you can choose if you want to do it, pay it, buy it, etc.柯林斯英英字典 If something is optional, you can choose whether or not you do it or have it. optional劍橋字典optional柯林斯字典專業(yè)釋義體育選項(xiàng)課The optional course of volleyball is one of the courses opened in general colleges.排球選項(xiàng)課是普通高校普遍開(kāi)設(shè)的體育課程教學(xué)內(nèi)容之一。語(yǔ)言學(xué)可選The study reveals that nine generic elements constitute the Generic Structural Potential (GSP) of LJAA, of which the Purpose of Study is the sole obligatory element and the rest remain optional.研究揭示,語(yǔ)言學(xué)期刊文章摘要的體裁結(jié)構(gòu)潛勢(shì)包括九個(gè)成分。 其中研究目的是必要成分,其余為可選成分。數(shù)學(xué)任選的任選(的)計(jì)算機(jī)科學(xué)技術(shù)選擇性選項(xiàng)任選電子、通信與自動(dòng)控制技術(shù)任選的可選的