pioneer的一般过去时怎么写？

pioneer的现在完成时为：pioneered...

pioneer的现在进行时为：pioneering...

A heavy stockade around the cabin protected the pioneer from attack.小屋周围的厚厚的栅栏保护拓荒者免受攻击。Sun Li is an explorer , a pioneer an expresser of the new territory of literature.孙犁是文学新地的发现者、抒写者、开拓者.Two members of the Young Pione...

pioneer的近义词/同义词有：forerunner, colonist, leader, settler, forerunner, colonist, leader, settler, inventor。n.pioneer的近义词（开拓者;移居者）：forerunner, colonist, leader, settler。pioneer的近义词（其他释义）：forerunner, colonist, leader, settler...

She was a suffragette and a birth control pioneer.她参加争取妇女选举权的运动，也是节育倡导者。a pioneer in the field of microsurgery显微外科领域的创始人He is a pioneer in modern medical practice.他是现代医学实践的先驱....

pioneer的第三人称单数（三单）为：pioneers...

pioneer的复数形式为：pioneers...

pioneer的音标：pioneer的英式发音音标为：[ˌpaɪə'nɪə(r)]pioneer的美式发音音标为：[ˌpaɪə'nɪr]...

n.拓荒者，开发者，先驱者，创始者vt.开拓，开发，做（…的）先锋，提倡...

n.压（力），压强，大气压，强迫v.强迫，迫使，竭力劝说...

Volunteers constitute more than 95% of The Center's work force.该中心95%以上的工作人员是志愿者.The work force has been laid off.工人们被辞退了.In the last ten years automation has reduced the work force here by half.在过去的10年中，自动化已经减少了这里一...

n.滑稽文章，诙谐，黄色小说...

“瓤”的拼音为：ráng...

chatty的音标：chatty的英式发音音标为：['tʃæti]chatty的美式发音音标为：['tʃæti]...

etiologies的音标：...

n.解放运动(=liberation)...

“泄气的”的英语可以翻译为：disappointing，frustrating，pathetic，soulless ...

高温耐蚀铅锡黄铜...

丁酯磷杀虫剂...

...the London terminus of the Channel Tunnel rail link.英吉利海峡隧道连接铁路的伦敦终点站How much to the terminus, please?请问,到终点站票价多少?We arrived at the terminus.我们到达了终点站.Trains vomit out crowds of passengers at a terminus.成群的旅客在终点站从列车中挤出...

Carbon steel bars shall be free of scarfing in multiples of 50 " . "碳 钢条 应该自如地嵌接在50倍于自身的斜嵌槽中....

“丰收”的反义词：歉收, 饥馑, 减产。...

“控制”的反义词：放纵。...

“要求者”的英语可以翻译为：demander，pretender，claimer ...