The problem is that catalysts and membranes have been expensive until recently.请问这里catalysts and membranes是最近才开始变贵,还是从以前到最近一直都是这么贵,还是说以前一直贵,但最近不贵了?还请教 until recently 是否有多种不同的用法?
John was given the same suitcase his father and grandfather ____ (take) with them to school.这里是不是可以填 took / had taken / would take三种?如果用 had taken 的话,会不会被理解为“已经被带去学校,而没带回来”,类似于had gone to 用法?谢谢
"The only thing she's mentioned is a ballerina dress. It's priced at $ 125. She's been invited to some parties by her friends at school."she's mentioned 是完成时吧?
Therefore, the developed hierarchical porous biomass-derived carbon materials are promising electrode materials and more importantly are expected to be used in a variety of energy storage applications. 这个句子正确吗?有语法错误吗?请教下,谢谢!
I realize something drastic must be done, and I start all over at the beginning. 后半句译文:一切我又重新开始。 all over是什么意思?all是副词修饰start吗?over at beginning是在开始的整个阶段吗?
Correlational analyses shown that Time1 exposure to soap operas predicted internalization of the slender ideal and level of appearance schema at 1-year follow up.
...好,看到下面这个句子:One day when entering your home, your mother says your family is having dinner with the family of one of her old friends. “when”是引导的定语从句修饰“day”?还是one day是后面这个状语从句里的,为了强调提前了?谢谢老师。
For all of Silicon Valley ‘s frofessed support for clean power over fossil fuels,the energy industry represents a huge opportunity.
请问前半句 for all of .....over fossil fuels应该怎么翻译?