名词
1. I hid the message in a cleft in the rock.
我把情报藏在石块的裂缝里。
1. 裂口：内切酶的活性位点位于一个开放的裂口(cleft)中,它可结合在纤维素链的任何部位并切断纤维素链. 外切酶的活性位点位于一个长环状通道中,它只能从纤维素链的非还原性末端切下纤维二糖. (
2) 纤维素结合结构域:CBD在纤维素酶中位于肽链的氨基端或羧基端,
1. (石头或地面的)罅隙，裂隙，裂口
A cleft in a rock or in the ground is a narrow opening in it.
e.g. ...a narrow cleft in the rocks too small for humans to enter.
岩石之间人无法通过的一条窄缝
2. (下巴上的)凹口
A cleft in someone's chin is a line down the middle of it.
3. (下巴)有凹口的
If someone has a cleft chin, they have a cleft in their chin.
4. 左右为难的；进退维谷的
If you say that a person or organization is in a cleft stick, you mean that they are in a difficult situation which will bring them problems and harm whatever they decide to do.
5.