專業(yè)英語(yǔ)中的常見語(yǔ)法現(xiàn)象分析-wenkub
2023-04-21 07:45:27 本頁(yè)面
【正文】 ter.The use of IPNs has received a great deal of attention in recent years and different kinds of IPNhave been synthesized with different positions.The major amount of work on size distributions has been on polyesters and polyimides.A sizeable amount work has been published on the copolymerizations of various cyclicmonomers.以下結(jié)構(gòu)的謂語(yǔ)的數(shù)由前一個(gè)決定, as well as……由較靠近謂語(yǔ)動(dòng)詞的決定not only……but also……either……or……neither……nor……◆ 當(dāng)含意上強(qiáng)調(diào)復(fù)數(shù)時(shí)建議用復(fù)數(shù)。另外在文章的開頭和結(jié)論部分有事也使用we，如in this paper, we report…或者we concluded that…等時(shí)態(tài)主要使用三種時(shí)態(tài)：一般現(xiàn)在時(shí)，一般過(guò)去時(shí)和現(xiàn)在完成時(shí)(1) 在敘述一般的科學(xué)原理、公式推導(dǎo)、計(jì)算過(guò)程和結(jié)論時(shí)，常用一般現(xiàn)在時(shí)；如當(dāng)提到本文、此圖、此表等說(shuō)明了、表達(dá)了什么時(shí)This paper describes ……The focus of this paper is ……Figure 1 shows ……Most of the mon condensation polymers are listed in Table 11.(2) 在敘述某種實(shí)驗(yàn)操作、試劑配制時(shí)，常使用一般過(guò)去時(shí)；例如：Novozym435 ( g) was suspended in 25 mL of nanopure water in a 100 mL roundbottomed flask fitted with a water cooled condenser. The lipase suspension was refluxed for 14 h. The suspension was then allowed to cool to room temperature, and water was removed by freeze drying…. The reaction vials were capped tightly and shaken vigorously for a few minutes. Thereaction vials were then placed in a constanttemperature water bath maintained at 37176。C for 3h with magnetic stirring….(3) 在敘述已經(jīng)發(fā)生的并且延續(xù)到現(xiàn)在的事情時(shí)使用現(xiàn)在完成時(shí)，如描述研究進(jìn)展使用In recent years作時(shí)間狀語(yǔ)時(shí)，通常使用完成時(shí)In recent years, Plesch and coworkers have concluded that many socalled cationic polymerizations do not proceed through intermediates of an ionic nature.時(shí)態(tài)是個(gè)比較復(fù)雜的問(wèn)題雖然有一般的規(guī)則但往往在實(shí)際文章中很難把握，需要注意的是在同一段落中要避免時(shí)態(tài)跳躍。The catalyst concentrations for the different reactions are different.Our research focuses on the syntheses and characterizations of a series of polycarbonates with different chemical structures.The physical and chemical properties of this pound have been studied.The chain lengths of the oligomers with different molecular weights are different.當(dāng)含意上不強(qiáng)調(diào)復(fù)數(shù)時(shí)可用單數(shù)或復(fù)數(shù)。以下是在學(xué)術(shù)文章中通常視為可數(shù)名詞的單詞：但在一般字典中它們或它們做某種含義解時(shí)可能被劃歸不可數(shù)名詞。C.Fig. 8 Dependence of the ease of cyclization on the size of the ring.☆ 具體的化學(xué)藥品、化學(xué)物質(zhì)前通常不加冠詞：The polymer
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