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- The theory of infrasound wave s synthesis is introduced first in this paper,and the transmit equipment of infrasound wave is studied laterly. 本文介绍了一种次声波的合成原理,并对次声波的发射装置进行了研究,主要分析了超声波换能器输出波形对次声波频率精度的影响。
- Dehydroepiandrosterone(DHEA), a kind steroid hormone of the highest concentration in the plasma, is the intermedia product of the gonadal hormone’s synthesis. 脱氢表雄酮（DHEA）是性激素合成过程的中间产物，是血浆中浓度最高的类固醇激素。大量的流行病学及动物实验均显示，DHEA具有较好的预防和治疗AS作用。
- They spend the winter(s) in a warmer climate. 他们在气候较暖的地方过冬。
- Most plural nouns in English end in "s". 英语的复数名词多以“s”结尾。
- The sweater had shrunk after repeated washing(s). 这件套头毛衣洗过多次已缩水了。
- Some old folk(s) have peculiar tastes. 有些老人有特殊的爱好。
- Answer the following question(s). 回答下列问题。
- Most plural nouns in English end in s'. 英语的复数名词多以s结尾。
- The drug affects one's power(s) of concentration. 这种药影响人精神不能集中。
- A label with Perkin's name is tied to the handle. 提箱上有一个系着标签的金属提手。
- Here are the designs. Which one(s) do you prefer? 这就是那些图样.;你喜欢哪一个[些]?
- Which journal(s) do you subscribe to? 你订阅哪一种杂志?
- The novel had an enormous vogue in the 1930's. 这本小说在三十年代曾广为流传。
- He earned four A's in the final examinations. 他期末考试四门功课得优。
- The Beatles were the pop idols of the 60's. 披头士乐队是六十年代人们崇拜的偶像。
- He returned to the fold at his 80's. 他在八十高龄又恢复原来的宗教信仰。
- She has an amused twinkle in her eye(s). 她高兴得双目熠熠发亮。
- Driving with worn tread(s) can be dangerous. 轮胎胎面磨损的汽车开著有危险。
- Kristiina W,Tapio A.Expedient synthesis of polyhydroxyisoflavones[J] .J.Chem. Soc - Perkin Trans. 1991,12:3005. 蔡小华;姚祖风;颜文斌;等.;抗癌药物金雀异黄酮的合成进展[J]
- My expostulation(s) had no effect. 我提出的劝告毫无作用。
