helpline的复数形式怎么拼写？

Should you lose your ticket call collect on STA's helpline.若遗失机票，请拨打STA的免费求助热线。...

helpline的音标：helpline的英式发音音标为：['helplaɪn]helpline的美式发音音标为：[]...

n.热线服务电话...

catnap的复数形式为：catnaps...

n.裸子植物...

adj.尖锐的，苛刻的，鲜明的，乱砍的v.挥砍( slash的现在分词 )，鞭打，割破，削减...

n.泽兰素...

vt.命令（decree的过去式与过去分词形式）...

A Western European summit was held in Bonn.在波恩举行了西欧各国首脑会议。In 1949 Bonn was a small, insignificant city.1949年时波恩还是个无足轻重的小城市。He has put the Bonn government in an embarrassing position...他将波恩政府置于窘地。Kiev hopes to cement clos...

n.震荡( concussion的名词复数 )，脑震荡，冲击，震动...

鹳形目...

square root的复数形式为：square roots...

closestool的音标：closestool的英式发音音标为：['kləʊsstu:l]closestool的美式发音音标为：['kloʊsˌstul]...

“闪现”的拼音为：shǎn xiàn...

“冰片”的拼音为：bīng piàn...

minutiae的音标：minutiae的英式发音音标为：[maɪ'nju:ʃii:]minutiae的美式发音音标为：[mɪ'nuʃii]...

n.犯罪行为...

televise的第三人称单数（三单）为：televises...