科技英语语法与表达.ppt

2)??语态 与被动语态相比，主动语态更直接，并口语的味道较少 The fact that such processes are under strict stereoelectronic control is demonstrated by our work in this area. → Our work in this area demonstrates that such processes are under strict stereoelectronic control. P.O. Post Office (with Box and number) ref(s) reference(s)[with number(s)] sp vol specific volume U.K. United Kingdom U.S. United States USP United States Pharmacopeia UV ultraviolet vol volume vs versus v/v volume per volume wt weight w/v weight per volume w/w weight per weight such as 诸如 for example 例如 e. g. 是拉丁文exempli gratia 的缩写，等同于 for example i. e. 等同于 that is, in other words, namely etc. 是 et cetera 的缩写，等同于and so on, 用于列举事物 et al 是拉丁文et alii 的缩写，等同于and others, 用于列举人 升、降温速率也可用with, 但如with已用于使用某种仪器前，则扫描速率仍须用at。 The melting range of this polymer was 138～163℃, and the heat of fusion was 24 cal/g, as determined by differential scanning calorimetry with a scan speed of 8℃/min. ? … subsequently the specimens were cooled down, and crystallization thermograms were recorded at scan speed of 0.5～32℃/min with a differential scanning calorimeter manufactured by Perkin-Elmer (DSC model 1 B). By 使用方法 differential scanning calorimetry With 使用仪器differential scanning calorimeter ? in 按（升、降温）模式 The following equation is valid for the heat flow rate absorbed by the sample (without reference sample) in (quasi-) steady heating mode. Peak area calibration can be performed in two ways. ? 2) 由相同介词引起的相互平行的对等结构 The amorphous subsystem is linked to the equilibrium melt, followed by extrapolation into the nonequilibrium, supercooled melt to the glass , as described in Section V.A.1 and Fig 2. The following is valid for the (steady-state) heat flow rates exchanged between furnace and sample, φfs, between furnace and r