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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. 本文介紹了一種次聲波的合成原理,並對次聲波的發射裝置進行了研究,主要分析了超聲波換能器輸出波形對次聲波頻率精度的影響。
- Dehydroepiandrosterone(DHEA), a kind steroid hormone of the highest concentration in the plasma, is the intermedia product of the gonadal hormone』s synthesis. 脫氫表雄酮（DHEA）是性激素合成過程的中間產物，是血漿中濃度最高的類固醇激素。大量的流行病學及動物實驗均顯示，DHEA具有較好的預防和治療AS作用。
- They spend the winter(s) in a warmer climate. 他們在氣候較暖的地方過冬。
- Most plural nouns in English end in "s". 英語的複數名詞多以「s」結尾。
- The sweater had shrunk after repeated washing(s). 這件套頭毛衣洗過多次已縮水了。
- Some old folk(s) have peculiar tastes. 有些老人有特殊的愛好。
- Answer the following question(s). 回答下列問題。
- Most plural nouns in English end in s'. 英語的複數名詞多以s結尾。
- The drug affects one's power(s) of concentration. 這種葯影響人精神不能集中。
- Here are the designs. Which one(s) do you prefer? 這就是那些圖樣.;你喜歡哪一個[些]?
- Which journal(s) do you subscribe to? 你訂閱哪一種雜誌?
- The novel had an enormous vogue in the 1930's. 這本小說在三十年代曾廣為流傳。
- He earned four A's in the final examinations. 他期末考試四門功課得優。
- The Beatles were the pop idols of the 60's. 披頭士樂隊是六十年代人們崇拜的偶像。
- He returned to the fold at his 80's. 他在八十高齡又恢復原來的宗教信仰。
- She has an amused twinkle in her eye(s). 她高興得雙目熠熠發亮。
- Driving with worn tread(s) can be dangerous. 輪胎胎面磨損的汽車開著有危險。
- My expostulation(s) had no effect. 我提出的勸告毫無作用。
- We measured the difference(s) in temperature. 我們測量了溫度的變化。
- Also a facilescheme was designed for synthesis of 5-aralkylpyrrolizinones from pyrrole through acylation, reduction, Michael addition and Hoesch reaction. 設計了一條以吡咯為原料，經醯化、還原、Michael加成、Hoesch反應合成5-芳烷基吡里酮類化合物簡捷可行的合成路線，成功地製得了目標化合物。
