uncertain的近义词有：questionable, doubtful, ambigous, uncertain。下面这些形容词均含"怀疑的，不确定的"的含义：questionable：通常指怀疑某行为是否恰当，或指有根有据的怀疑。doubtful：指对某个问题持积极怀疑的，有疑问的态度，强调缺乏确信。 ambigous：指因缺乏明确感或因为有各种不同的解释而值得怀疑。uncertain：多指因缺乏证据或了解而捉摸不定，也指因不能预...

maintain的第三人称单数（三单）为：maintains...

v.保持( maintain的现在分词 )，保养，坚持，保卫...

Last they saw of him, he was hightail down the steet.上次他们看见他的时候他正在街上赶紧地走避他们.After school, he would hightail it home.放学后, 他很快地跑回家.John, hightail down to the station and see if your daddy's on the train.约翰, 快跑去火车站看看你爹...

attainments的音标：attainments的英式发音音标为：[ə'teɪnmənts]attainments的美式发音音标为：[ə'teɪnmənts]...

adv.无疑，当然，确定，肯定...

dovetail的复数形式为：dovetails...

I wouldn't entertain the idea of such an unsociable job.我不会考虑从事这种不跟人打交道的工作。I feel how foolish I am to entertain doubts.我竟然心存怀疑，真是太愚蠢了。Michael left his sickbed to entertain his house guests.迈克尔走下病床去招待客人。...

v.弄清，确定，查明( ascertain的过去式和过去分词 )...

Fire crews are hoping they can achieve full containment of the fire before the winds pick up.消防队员希望趁着风还没有起来将火势完全控制住。Your list might include such things as cost containment, quality, or customer satisfaction.你的清单上应列有诸如成本控...

obtainable的反义词有：unobtainable。adj.obtainable的反义词（可获得的）：unobtainable。...

He caught her arm in a subconscious attempt to detain her.他下意识地抓住她的胳膊想挽留她。He was instructed to inspect the cargo on the ship and detain such cargo if necessary.他奉命去检查船上所载货物并于必要时扣留该项货物.The act allows police to detain a su...

downstairs的音标：downstairs的英式发音音标为：[ˌdaʊn'steəz]downstairs的美式发音音标为：[ˌdaʊn'sterz]...

abstain的第三人称单数（三单）为：abstains...

v.缩短，剥夺（特权，官衔等），削减...

ascertained的音标：ascertained的英式发音音标为：[æsə'teɪnd]ascertained的美式发音音标为：[æsə'teɪnd]...

entails的音标：...

v.维持( sustain的第三人称单数 )，支撑，忍受，长期保持...

Abstain from sex or use condoms.禁绝性事或使用安全套。Do you drink alcohol, smoke, or abstain?你喝酒抽烟吗，还是烟酒不沾？His doctor ordered him to abstain from beer and wine.他的医生嘱咐他戒酒....

retainer的复数形式为：retainers...

He changed from voting against to abstaining.他原打算投反对票，后来改为弃权了。Abstaining from killing, from taking what is not given , & from illicIt'sex.诸比丘!远离杀生, 远离不 与 取,于爱欲远离邪行.Abstaining from arguments was also linked to an unu...

curtailed的音标：...

containment的音标：containment的英式发音音标为：[kən'teɪnmənt]containment的美式发音音标为：[kən'tenmənt]...

detail的音标：detail的英式发音音标为：['di:teɪl]detail的美式发音音标为：[dɪ'teɪl]...

abstain的现在完成时为：abstained...

mountaineers的音标：...

More than a hundred firemen are still trying to contain the fire at the plant...上百名消防队员仍在试图控制工厂的火势。The tears also contain a potent microbe - killer called lysozyme, which guards me from infective bacteria.眼泪里还包含一种叫做溶菌酶的高...

adj.可确定（探知），可发现的...

If the antibody reacted, the blood was tainted and should be discarded.如抗体发生反应, 则说明血液已被感染,便不能使用.The fringes of the pundIt'set have already been intimating that these tainted - food incidents are deliberate.有人已经宣称这些食...

abstain的一般过去时为：abstained...