您要查找的是不是：
- 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。
- This layer of rock contains a lot of flint. 这一岩层中有大量燧石。
- 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。
- The inner layer of the wall of a spore. 孢子内壁孢子壁的内层
- How much do you know about the works of Mark Twin. 马克。吐温写的作品你知道多少？
- There is a fine layer of dust on the desk. 桌子上有一层薄薄的尘土。
- 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。
- 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。
- The middle, usually fleshy layer of a fruit wall. 中果皮果皮中间通常含肉较多的那一层
- The bottom layer is a mixture of sand and clay. 最下面的一层是沙和泥的混合物。
- He rubbed out the mark on his book. 他把他书上的记号擦掉了。
- A fine layer of dust covers everything. 所有的东西都盖了一层薄薄的灰尘。
- Has she ever written a letter to Mark? 她曾经写信给马克吗？
- Everyone knows Tom as an easy mark. 大家都知道汤姆是个容易上当受骗的人。
- Do you feel up to the mark this morning? 今天早上你觉得怎么样。
- A layer, as of doubled-over cloth or of paperboard. 一层一层，如折叠过的布料或纸板的
