In the absence of successful efforts to stem the loss of topsoil, the social effects of erosion will probably first be seen in africa . 在控制表土流失的努力缺乏成效的情況下，土壤侵蝕的社會影響將可能首先出現在非洲。
In the absence of air resistance, the only force on a projectile is its weight, and the mechanical energy of the projectile remains constant . 忽略空氣阻力，作用在拋體上的力只是它的重量，因而該拋體的機械能是守恒的。
In the absence of secretary for education and manpower 在教育統籌局局長缺席期間
In the absence of the manager , i shall be in charge 經理不在的時候，由我負責。
China ' s security market in the absence of credit 試析誠信缺失下的中國證券市場
Option is optional . in the absence of the 選項一起使用時，格式文件是可選的。
Plants can ' t grow well in the absence of water 沒有水植物就不能茁壯成長。
In the absence of secretary for health , welfare and food 在生福利及食物局局長缺席期間
In the absence of mr . jackson , we held a meeting 在杰克遜先生不在的情況下
