pen的一般过去时怎么写？

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

pen的第三人称单数（三单）为：pens...

pen的复数形式为：pens...

pen的现在进行时为：penning...

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的现在完成时为：penned...

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

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...

某些脉冲星发送脉冲比地球上最精确的时钟都准时。Some pulsars keep time better than the earth's most accurate clocks.埃尔加给自己的作品标上了精确的节奏标记。Elgar supplied his works with precise indications of tempo.即便很精确的病历也可能让医生产生错误的印象。Doctors can get the wro...

n.农业，资源管理，妥善管理...

tell的一般过去时为：told...

“醛碱”的英语可以翻译为：aldin ...

可逼近性，可近似性...

vt.滋养，施肥于，抚养，教养，怀抱（希望、怨恨），使健壮...

barymastia的音标：barymastia的英式发音音标为：[bə'ri:mɑ:stɪə]barymastia的美式发音音标为：[bə'rimɑstɪr]...

compliant的音标：compliant的英式发音音标为：[kəm'plaɪənt]compliant的美式发音音标为：[kəm'plaɪənt]...

aldermanry的音标：aldermanry的英式发音音标为：[ɔ:ldə'mənrɪ]aldermanry的美式发音音标为：[ɔldə'mənrɪ]...

Mayday! Mayday! - All right now, everybody, get in crash positions!救命! 救命! - 好的,现在, 所有人, 做好坠机姿势!UN peacekeeping forces are expected to take up positions along the border.联合国维和部队估计会在边界线上就位。The satellite fixes positions by...

n.尸蜡（动物尸体在湿处腐烂后产生的软蜡状物质）...

“无限的”的英语可以翻译为：infinite，limitless，spaceless，boundless，measureless ...

他在国际上的成就为其信念作出了最好的注解。By his international achievements he leaves a fitting monument to his beliefs.她保留了许多副本以便作进一步的注解。She retained a number of copies for further annotation.他给近1.5万部音乐作品作过注解。He supplied annotations to near...

“插补”的拼音为：chā bǔ...

“钡中毒”的拼音为：bèi zhòng dú...