1. 清除;清理 Clearance is the removal of old buildings, trees, or other things that are not wanted from an area.
e.g. ...a slum clearance operation in Nairobi... 內羅畢拆除貧民窟的行動(dòng) e.g. The UN pledged to help supervise the clearance of mines. 聯(lián)合國承諾協(xié)助監督掃雷工作。
2. (官方的)批準，許可 If you get clearance to do or have something, you get official approval or permission to do or have it.
clearance
e.g. Thai Airways said the plane had been given clearance to land... 泰國航空公司說(shuō)，該飛機已經(jīng)得到降落許可。 e.g. He has a security clearance that allows him access to classified information. 他持有安全許可，可以接觸機密信息。
3. (路面、河面與上方橋梁之間的)凈空，間隙，間距 The clearance of a bridge is the distance between the lowest point of the bridge and the road or the water under the bridge.
clearance的解釋
e.g. The lowest fixed bridge has 12.8m clearance. 最低的固定橋下方通行高度為12.8米。
clearance英英釋義
noun
1. permission to proceed
e.g. the plane was given clearance to land
2. the distance by which one thing clears another the space between them
3. vertical space available to allow easy passage under something