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。