(1)She did not answer immediately, but meditated again, with her eyes fixed on the opposite wall.柯林斯词典fix - vt/vi 凝视 fix your eyes on sth; your eyes fix on sth因此，上句中的fixed是否可以改为fixing呢？ 如果可以，用fixed强调状态，用fixing强调正在进行的...
I did it perfectly. After all these years. The old lift-and-dive trap.
I loosened my grip and tugged on the string, dipping and dodging the green
kite. A series of quick sidearm jerks and our kite shot up counter-clockwise,
in a half circle. Suddenly I was on top. The green kite was scrambling now,
...
...ls of the kidney, so that blood
flow diminishes, the kidney produces renin and discharges it into the blood.英语中不是不能只用逗号分隔独立句子吗，请问第三个分句前为什么没有连词（比如and）？或者是if、so that有什么特殊用法？谢谢！
1）It had become the crossroads of travel north and south and east and west, and the little village leaped to life.2）The caption indicates that they can travel north and south extensively with combined legs.在1）句中，travel是名词吗？north and south 为形容词短语后置修饰trave...
It was a simple stone—you may still see it there today and on it was just one letter；翻译：这是一块很普通的石头——今天你可能还会在那儿看到它，在那上面只有一个字母。请问：on it was just one letter 是一个完整的句子吗？on it 难道是主语吗...
我们都知道祈使句加and这个结构，比如说 Think it over and you will find the answer.但是这种用法省略掉了and，还对吗？比如 Do a test，you will find out. 就像这样，如果没有and了，还成立吗？是否应该是 doing a test，you will find out？
It(a system of conservation)tends to ignore, and thus eventually to eliminate, many elements in the land community that lack commercial value, but that are essential to its healthy functioning.请老师帮忙翻译并分析此句，谢谢！
...time, made little bunny (兔子)
cakes for all its stores throughout Cleveland. It happened that the plant
downtown needed eight kids for temporary help during our spring break, for
which I had no plans beyond listening to my favorite records. I’d earn minimum
wage. I’d see how a factory worked....
...么。（摘自《韦氏高阶英汉双解词典》p.2113)
（3）We
do not know for certain that he will come . 我们不确切知道他是否会来。（摘自[英]弗雷德里克.托.伍德著《英语介词习语词典》p.54）
（4）I
can’t say for certain when we’ll arrive.
我说...