pen的复数形式怎么写？

Use different colours of felt pen on your sketch to avoid confusion.用不同颜色的毡头笔画草图，以免搞混。Draw the basic outlines in black felt-tip pen (see fig. 4).用黑色毡头笔画出基本轮廓（见图4）。He sat behind a desk laboriously writing with an Army iss...

pen的现在完成时为：penned...

pen的音标：pen的英式发音音标为：[pen]pen的美式发音音标为：[pɛn]...

n.笔，笔尖，笔法，文笔，作家，围栏vt.写，把…关入栏中，关押，囚禁...

Jack filched a pen from his friend's pocket.杰克从朋友的口袋里偷走了一支钢笔.He has used a mixture of mosaic, collage and felt-tip pen.他混合使用了马赛克、拼贴画和毡头笔。...a 14-carat gold fountain pen.14开金钢笔Could you hold the line and I'll ju...

pen的现在进行时为：penning...

pen的一般过去时为：penned...

pen的第三人称单数（三单）为：pens...

巨吻棘头虫病...

n.少年男女，青少年，青少年( teenager的名词复数 )...

He gently opened the throttle, and the ship began to ease forward.他轻轻松开油门杆，轮船开始缓缓前行。You have to push the throttle forward for more power.你得把油门杆往前推来加大马力。He stepped swiftly to the controls to throttle back the engine.他快步来到...

decarbonitation的音标：decarbonitation的英式发音音标为：[di:kɑ:bənɪ'teɪʃn]decarbonitation的美式发音音标为：[dikɑbənɪ'teɪʃn]...

aquamarinus的音标：aquamarinus的英式发音音标为：[ækwəmə'raɪnəs]aquamarinus的美式发音音标为：[ækwəmə'raɪnəs]...

“让步”的拼音为：ràng bù...

“石花菜”的英语可以翻译为：[医] Gelidium amansii Lamx.石花菜科，[地方名]鸡毛菜，藻体分主枝、分枝、小枝，直立丛生。枝体扁平，分枝渐细，呈现状互生、对生，枝端急尖。主枝基部是固着器。颜色随海区环境、光照的不同而有变化。，agar ...

Tilburg的音标：Tilburg的英式发音音标为：['tilbə:ɡ,-bə:rk]Tilburg的美式发音音标为：['tɪlˌbɚɡ, -ˌbɚrū]...

“古词语”的拼音为：gǔ cí yǔ...

n.时尚，时髦的东西( craze的名词复数 )...

ex-的音标：ex-的英式发音音标为：[eks]ex-的美式发音音标为：[ɛks]...

胆总管回肠吻合术...

MoAb to CD 11 b and ICAM - 1 significantly inhibited this adhesiveness ( P < ( 0.05 )).CD11b单抗和 ICAM1 单抗可明显抑制这种粘附 ( P...

empanels的音标：...

n.男子名...