The heptane compound has a primary purpose as a plasticizer for doublebase propellant systems.化合物庚烷的主要用途是作为双基推进剂的增塑剂.However, it is difficult to produce multi branched i heptane and restrain its cracking.正庚烷异构化的难点在于高选择性地...

cavities的音标：...

grief的反义词有：delight, glee, joy, comfort, mirth, delight, joy。n.grief的反义词（悲痛;不幸;失败）：delight, glee, joy。grief的反义词（其他释义）：comfort, mirth, delight, joy。...

On a clear night, the sky appears to be filled with stars.在晴朗的夜晚, 天空中布满了恒星.We are be filled with exultation in the new victory.我们在新的胜利中欢欣鼓舞.Casual conversation tends to be filled with repetition.随意的交谈中常常有许多重复的话....

On paper, I am the healthiest man alive, yet I feel permanently unwell.理论上，我是活着的最健康的人，但是我总感觉不舒服。Swimming is one of the healthiest forms of exercise.游泳是最有益于健康的运动方式之一.Who is the healthiest person in your family?在你家里,谁是最健康的...

adj.恼怒的，生气的v.使发怒( irritate的过去式和过去分词 )，使急躁，使感到不适，使疼痛...

remain的反义词有：perish, migrate, wander, go, quit, perish。vi.remain的反义词（剩下;继续存在）：perish。remain的反义词（其他释义）：migrate, wander, go, quit, perish。...

Brisbane的音标：Brisbane的英式发音音标为：['brɪzbən]Brisbane的美式发音音标为：['brɪzbən]...

The lexicographer knew that the English lexis was changing.字典编纂者知道英语词汇在不断变化。Reviewing philology phonology dialectology and lexis studying history, which aiming at the annotation of Lushi - chunqiu's. "回顾了文献学、音韵学、方言学...

servant的反义词有：master, master。n.servant的反义词（仆人,雇工）：master。servant的反义词（其他释义）：master。...

souvenir的近义词有：gift, present, souvenir, tip。下面这些名词都有"礼物，赠品"的含义：gift：含义广，既可指真诚相送的礼物、赠品或生日、节日礼物，又可指捐赠的物品或捐款等。present：普通用词，指给亲朋好友的礼物，赠者与被赠者之间存在某种个人关系，所赠礼物一般不是很昂贵的。souvenir：指对人、物、地点或事件有纪念意义的礼物或纪念品。tip：指为酬谢他人服务而给的小费。 ...

chore的近义词/同义词有：assignment, job, work, task, function, duty, function, thing, employment, mission, work, duty, task, labor, errand, assignment, job。n.chore的近义词（打杂;讨厌的工作）：assignment, job, work, task, function, duty。chore的近...

intellect的反义词有：ignoramus, ignorance。n.intellect的反义词（智力;出众的才华）：ignoramus。intellect的反义词（其他释义）：ignorance。...

Ascaridoidea的音标：...

I was a dunce at chemistry.我在化学方面是个劣等生....a chemistry textbook.化学课本Ester is one of the most important compounds in Organic Chemistry.酯是有机化学中最主要的化合物之一.It was by using anima that Besant and Leadbeater could observe atoms a...

ensure的近义词/同义词有：cover, defend, protect, shelter, guard, shield, screen, make, guarantee, certain, assure, shield, guard, shelter, screen, certain, guarantee, assure, defend, protect, cover, make。vt.ensure的近义词（保护）：cover, ...

The barometer marked a continuing fall in atmospheric pressure.气压表表明气压在继续下降.The arrow on the barometer was pointing to'stormy ".气压计上的箭头指向 “ 有暴风雨 ”.The barometer is falling.气压正在下降....

frequently的反义词有：infrequently, rarely。adv.frequently的反义词（时常;屡次）：infrequently。frequently的反义词（其他释义）：rarely。...

dancer的音标：dancer的英式发音音标为：['dɑ:nsə(r)]dancer的美式发音音标为：['dænsə(r)]...

sociable的反义词有：unsociable。adj.sociable的反义词（爱交际的;易亲近的）：unsociable。...

Detailed analysis of the power supply and working principle of topographies.详细分析了电源的拓朴图及工作原理....

帮助（某人）（做）某事...

超同步的...

The man with the umbrella turned the corner again.拿伞的人又拐进了拐角处。She opens her umbrella, and walks up River Street.她撑开伞，沿着河街向前走。Does coincidence come under the umbrella of the paranormal?巧合属于超自然现象吗？...

v.来( come的过去式 )，到达，达到（认识、理解或相信的程度），出生...

metapodalia的音标：metapodalia的英式发音音标为：[metəpɒ'deɪlɪə]metapodalia的美式发音音标为：[metəpɒ'deɪlɪr]...

guest的反义词有：host, host。n.guest的反义词（宾客;顾客）：host。guest的反义词（其他释义）：host。...

necklace的近义词/同义词有：choker, riviere, necklet, pearls, locket, strand, collar, pendant, beads, torque, chain, chaplet, lavalier, wampum。n.necklace的近义词（项圈,项链,下垂物,垂饰）：choker, riviere, necklet, pearls, locket, strand, collar, ...

bungle的一般过去时为：bungled...

It didn't come as a great surprise to me, I might say.可以这么说，这并没有令我大吃一惊。..that delicious feeling of surprise.那种惊喜之情A surprise victor in 2005, Lech Kaczynski an uneasy president.2005年大选莱赫?卡钦斯基出乎意料获胜, 当选总统,局促不安的秉性随之显现....