period什么意思
period
n. 一段时间; 阶段; 时期; 课; 月经; 句号;
adj. 具有每个时代特征的;
adv. 到此为止;
变形 复数: periods
双语例句
1. Over a given period, the value of shares will rise and fall.
股票的价值在某一特定的时期内会有涨跌。
2. South Africa was going through a period of irreversible change.
南非正在经历一场不可逆转的变革。
3. The next few weeks will be a period of readjustment.
接下来的几周将是适应阶段。
4. The gestation period can be anything between 95 and 150 days.
妊娠期从95天至150天不等。
5. After a further four-month extension of her probation period, she was sacked.
在又试用了4个月后，她被开除了。
specialize是什么意思
专门从事
双语对照
词典结果：
specialize
[英][’speʃəlaɪz][美][ˈspɛʃəˌlaɪz]
vi.专门从事; 专攻; 详细说明; 特化;
vt.使专门化; 使适应特殊情况; 详细说明; 列举;
第三人称单数：specializes过去分词：specialized现在进行时：specializing过去式：specialized
同反义词
in BRIT, also use 英国英语亦用 specialise
1.VERB专门从事;专门经营;专门研究;专攻If you specialize in a thing, you know a lot about it and concentrate a great deal of your time and energy on it, especially in your work or when you are studying or training. You also use specialize to talk about a restaurant which concentrates on a particular type of food.语法信息
...a University professor who specializes in the history of the Russian empire.
专门研究俄罗斯帝国历史的大学教授
specialization
This degree offers a major specialisation in Social Policy alongside a course in Sociology.
该学位主修社会政策，同时也包括一门社会学课程。
...an economist who has avoided narrow specialization.
避免了专业范围过窄的经济学家
例句:
1.
Most specialize in ecommerce scams and malware attacks on businesses.
他们中的大多数专门研究电子商务诈骗和商业上的恶意软件攻击。
2.
Laurel delaney runs globetrade.com and laureldelaney.com, chicago firms thatspecialize in international entrepreneurship.
laurel delaney管理着globetrade.com和laureldelaney.com两个网站专攻于国际企业家研究。
3.
Should ad agencies specialize in google adwords, not just super bowl spots?
广告代理是否应该专注于google adwords而不仅仅是超级杯？
4.
Smaller cities specialize in particular products, while larger ones flaunt their educationalcapacity and cultural appeal.
规模较小的城市专业于特定的产品，而大城市却炫耀着教育资源和文化吸引力。
5.
But you still need to see a gynecologist, because they specialize in pregnancies.
但你仍然需要看妇科医生，因为他们在怀孕专业化。
-per
handicap，hinder，obstruct，obstacle，hamper，barrier
hinder〓语气较轻,多指阻碍、拖延人或事,强调使进展速度缓慢下来.
obstruct〓正式用词,语气强,多指以干扰或设置障碍的方式阻碍交通,使不能自由畅通.
hamper〓侧重因受到约束或阻碍而造成的行动困难.
handicap〓主要强调不利条件造成的障碍
1. obstacle指“阻碍前进的东西或状况”, 如:
Her father’s opposition remained only their obstacle.
她父亲的反对是他们唯一的障碍
2.barrier 指“阻碍整个通道的阻塞物”, 如:
Your interference is a barrier of justice.
你的干预阻碍了正义
-pe
