您要查找的是不是：
- The annular markings on a tree indicate its age. 树的环形纹理显示其年龄。
- He vainly tried to mark the defacing stain out. 他试图除去有损外观的污迹，但没有成功。
- The markings along the route are quite plain. 路线沿途的标志都十分清楚。
- I make a carbon copy of my documents. 我用复写纸复写文件。
- Soft drinks contain carbon dioxide. 软饮料中含有二氧化碳。
- I have some carbon paper somewhere or other. 我记得我在什么地方放有复写纸。
- Her school work isn't quite up to the mark. 她的功课不大符合要求。
- That was just a lot of hot air what Mark said. 马克所说的不过是一大堆空话。
- War has left its mark on the country. 战争给该国留下了不可磨灭的痕迹。
- The public scandal left a black mark on his career. 这一尽人皆知的丑闻给他的事业留下了污点。
- She's a carbon copy of her sister. 她跟她姐姐一模一样。
- How much do you know about the works of Mark Twin. 马克。吐温写的作品你知道多少？
- Happy anniversary, Helen and Mark! 海伦、马克，祝你们结婚周年快乐！
- Mark and Barbara are going together now. 马克与巴巴拉现在正在谈恋爱。
- A copy made by using carbon paper. 复写本，副本用复写纸复印的一份
- Mark has lost his job and is worse off than ever. 马克的工作丢了，情况比以前更糟。
- A horse with patchy markings of white and another color. 杂色马，花马一匹有白色或另外一种色斑的马
- Plants can absorb carbon dioxide and release oxygen. 植物可以吸收二氧化碳释放氧气。
- He rubbed out the mark on his book. 他把他书上的记号擦掉了。
- Has she ever written a letter to Mark? 她曾经写信给马克吗？
