...d during the day they are still singing. Singing is a costly behaviour and it takes energy. So by increasing their song output, there might be some costs of energy. ”我对其中的Singing is a costly behaviour不理解，behaviour 不是不可数名词吗？它前面怎么可以用不定冠词呢...
...，下意识的，不受控制地感到不舒服而已。再比如：① it smells nice 被动(东西闻起来怎么样），不能用进行时。② i smell something burning in the kitchen 被动(我闻到一些什么），不能用进行时。只有③ he is smelling the chicken 主动(主语 he ...
"But in other people, it is energising." The study also found that the nurses' subjective sense of how demanding their job was of them was not correlated with fatigue either.请问：1.energising在这里是形容词词性吗？（百度了好久没查到）2.how demanding their job was of them...
The next day I met
with my other band teacher and told her I was having a problem and couldn’t
figure out why. She
asked me gently to play for her. I tried, but only an unpleasant sound came
out. She didn’t shout
at me and handed me a new reed (簧片). I put it in place and
tried again. To my g...
...。
He has a wide knowledge of history. 他有广泛的历史知识。
It is necessary to have a good knowledge of the essentials of English grammar. 了解英语语法的一些要素是必要的。
2. 我的疑问不包括 have some good knowledge of sth, have no knowledge of sth, his good kn...
..._ so well that we don’t have to make any changes. — It is indeed.A. to design B. designing
C. designed D. design 这题选 C，但是 sb is heard to do sth 被动要把 to 添加...
...rgon betrayed a lack of confidence, but one in five thought those who used it were untrustworthy or trying to cover something up.
请问:这里one in five之前为什么不可以用but而要用while呢，but不是可以表示对比吗？为何这里却只能用while？
Perhaps the sturdiest
economic rationale for buying local is that it stops the short-term stimulatory
effect of new spending—of which Mr Biden is planning a lot—from leaking overseas.在《经济学人》读到的一句话。如果构成关系分句，用a lot of which Mr Biden is planning就可...
...是后半段：…and saw spread before me the
darkened earth surrounding with her arms countless homes furnished with cradles
and beds, mothers' hearts and evening lamps, and young lives glad with a
gladness that knows nothing of its value for the world.困惑：young…world这一大串和前面...
...d of a job as they could have, had they been well-fed. Sullivan added that it also prevents them from being able to contribute to society, and the economy, and they would have in a healthier environment.原文翻译为：发育迟缓的儿童在学校里表现不佳。如果这些孩子营养充足...
...le, he left.
Sooner than marry that man, she would earn her living as a waitress
rather和sooner都有愿意的意思，但是和than组合就是不愿意的意思，我想说这是不是一种倒装了，他的原形than cause
trouble, he rather left
than marry that man, she would rather earn ...
...青山碧水，红花绿叶，使我惊讶而欢喜！Returned from the bitter cold North with its drab and dried up vegetation, I was amazed and delighted when greeted by the charming scenery of sapphire mountains and emerald rivers as well as red flowers and green leaves.
1. 书上说 not a bit=not at all，而 not at all 是可以变成 not...at all 的。那么 not a bit 是否也可以这样用呢？2. 在《牛津高阶双解字典第八版》关于 bit 的习语中有 not a bit | not one (little) bit，那么 not one (little) bit 的用法是否等于 not...
The main reason for these is that the thermal conductivity of the modified SC in the Structure II is smaller and its specific heat capacity is larger than those of sand gravel in the Structure I (Table 2).The main reason for these后的系动词是不应该使用are，应为我觉得that后面接了...