用法

C,are because of the interaction between two stars that orbit each other 时说除了because 用法错误外,the prase "two stars that orbit each other" illogically suggests that there are two particular stars causing all the phenomena in question,rather than various sets of stars in various locations.

为什么这里用了that 定语从句就表示特指，而ING结构则没有该含义？——————————————that定语从句是限定性修饰，--ing是非限定性修饰。ing形式一般是表示伴随，伴随状态或者是结果，可以理解为非限制性定语从句。限制性的定语从句把原句的意思改变了。

If both preprandial and postprandial blood glucose concentrations are high,then a four-injection per day regimen should be initiated.

如果餐前和餐后的血糖浓度偏高，那么就要开始每天四次注射的用法。

If both preprandial and postprandial blood glucose concentrationsare high, then a four-injection per day regimenshould be initiated.

如果餐前和餐后的血糖浓度偏高，那么就要开始每天四次注射的用法。

You don't need to know the rules for the present perfect tense.

你无需了解现在完成时的用法，你甚至可以不必知道"现在完成"是什么意思。

The present progressive denoting futurity also occurs in temporal and conditional clauses , on condition that there is future reference in the main clause.

现在进行体表示将来时间的用法还常见于某些时间状语分句和条件状语分句中。例如

Read the following sentences and explain the usage of the Present Progressive Passive Voice in each sentence to your partner.

方法指导：先翻译句子，再指出现在进行时被动语态的用法

The present progressive used to refer to the future, more often than not the near rather than distant future, in connection with a definite plan, arrangement or program, usually occurs in situations with obvious future reference.

这是现在进行体表示将来时间的用法。这种将来事态通常都是按照现在的计划安排近期内即将发生。例如

By contrast, the simple present lacks the subjective, emotional tone of the present progressive and states a fact objectively .

现在进行体的这一用法与一般现在时的区别在于后者只是说明事实，而前者则带有感情色彩，并且多半表示说话人的不满情绪。

The use of the present tense to describe past actions or states.

描写过去的动作或状态的现在时态的用法。

United States architect who was the presidentially appointed architect of Washington D.C. mills , robert mills

页面简介：沪江小D免费英语在线翻译网站提供mills是什么意思，mills的翻译、音标与发音、含义及用法、参考例句等信息。

The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。