Example 1 般现在时及其被动语态 PET films uniaxially(单轴地) drawn in hot water are studied by means of conventional dsc and modulated DSC (MDSC)... Variations of to with the water content and with the drawing are discussed in terms of the structure in these materials. The increments(增量)of△ Cp at T are also interpreted using a three phases model
• Example 1 • 一般现在时及其被动语态 PET films uniaxially（单轴地） drawn in hot water are studied by means of conventional DSC and modulated DSC (MDSC). …… Variations of Tg with the water content and with the drawing are discussed in terms of the structure in these materials. The increments（增量） of ΔCp at Tg are also interpreted using a three phases model
Example 2 般过去时及其被动语态 An analysis of the cure(硫化,固化) kinetics of several different formulations composed of bifunctional epoxy resins and aromatic diamines was performed...All kinetic parameters of the curing reaction were calculated and reported. Dynamic and isothermal(等温的)DSC yielded different results. An explanation was offered in terms of different curing mechanism which prevail under different curing conditions. A mechanism scheme was proposed to account for various possible reactions during cure
• Example 2 • 一般过去时及其被动语态 An analysis of the cure（硫化，固化） kinetics of several different formulations composed of bifunctional epoxy resins and aromatic diamines was performed. …… All kinetic parameters of the curing reaction were calculated and reported. Dynamic and isothermal（等温的） DSC yielded different results. An explanation was offered in terms of different curing mechanism which prevail under different curing conditions. A mechanism scheme was proposed to account for various possible reactions during cure
Example 3 现在完成时及其被动语态 The partial molar enthalpies(偏摩尔焓)ofmi× ing of NaHSO4 and KHSOa have been measured at 528K by dropping samples of pure compounds into molten mixtures (熔融混合物) of naso4 and KHso4 in Calvet calorimeter (热量计). From these values the molar enthalpy of mixing has been deduced The phase diagram of this system has been conf irmed by conductometric (=E) and thermal analysis methods an optimization method the excess entropy(过剩熵)of the liquid mixtures was also calculated
• Example 3 • 现在完成时及其被动语态 The partial molar enthalpies（偏摩尔焓） of mixing of NaHSO4 and KHSO4 have been measured at 528K by dropping samples of pure compounds into molten mixtures （熔融混合物） of NaHSO4 and KHSO4 in Calvet calorimeter （热量计）. From these values the molar enthalpy of mixing has been deduced. The phase diagram of this system has been confirmed by conductometric（导电）and thermal analysis methods. By an optimization method the excess entropy（过剩熵） of the liquid mixtures was also calculated
3、语态 目前,英文摘要仍以被动语态居多(见 上例),这种语态“可以在主语部分集中较多 的信息,起到信息前置,语义鲜明突出的效 果 主动语态也偶有出现,并有增长的趋势, 认为“主动语态表达的语句文字清晰、简捷明 快,表现力强,动作的执行者和动作的承受者 目了然,往往那给人一种干净利落、泾渭分 明的感觉
3、语态 目前，英文摘要仍以被动语态居多（见 上例），这种语态“可以在主语部分集中较多 的信息，起到信息前置，语义鲜明突出的效 果。” 主动语态也偶有出现，并有增长的趋势， 认为“主动语态表达的语句文字清晰、简捷明 快，表现力强，动作的执行者和动作的承受者 一目了然，往往那给人一种干净利落、泾渭分 明的感觉
作者告诉读者论述怎样的主题,可用现在时 过去时及其被动语态叙述实验方法与过程表 实验前业已完成的动作(过去的过去),用过 完成时。 例如: The crystallized samples had been polished before they were etched in a 0.5 HF solution at a temperature of 25 c for 2 对实验结果可用现在时(表示客观真理)或现在 成时(已取得的阶段性成果)
作者告诉读者论述怎样的主题，可用现在时；用 过去时及其被动语态叙述实验方法与过程,表示 实验前业已完成的动作（过去的过去），用过去 完成时。 例如： The crystallized samples had been polished before they were etched in a 0.5％ HF solution at a temperature of 25℃ for 2 s … 对实验结果可用现在时（表示客观真理）或现在 完成时（已取得的阶段性成果）