By responding to this single event , you can avoid having to write individual event handlers for child controls 。通过响应此单个事件，可以避免不必要地为子控件编写单独的事件处理程序。
In the 17th and 18th centuries they became swedish administrative and defensive centres for the german territories 在公元17世纪到18世纪，这里成为了瑞典对于日尔曼领土的管理和防御要地。
Your mission objectives range from defending strategically vital locations to simply destroying all enemy forces in the area 你的任务目标包括保卫战略要地和摧毁目标区域里的全部敌对力量。
Pests and nuisance causing animals are disinfested judiciously to avoid unnecessary disturbance to the ecological system 本署会以审慎的方法消灭虫鼠及有害的动物，以免不必要地扰乱生态环境。
Pests and nuisance - causing animals are disinfested judiciously to avoid unnecessary disturbance to the ecological system 本署会以审慎的方法消灭虫鼠和有害的动物，以免不必要地扰乱生态环境。
Research background : the dividend policy is one of the most important activities of corporate finance 一、研究背景股利政策是现代公司理财活动的三大核心之一,在公司财务活动中占据着重要地位。
Like all strategically placed islands , it has been vulnerable as a crossroad and invaluable as a military base 像所有位处战略要地的岛屿一样，它因所处地理位置重要而易受攻击，作为军事基地其是无价之宝。
Like all strategically placed islands , it has been vulnerable as a crossroad and invaluable as a military base 像所有位处战略要地的岛屿一样，它因位于交通要道而易受攻击，在作为军事基地这一点上,其更是无价之宝。
Therefore , the research of electronic multi - media mili tary geographic documentations in aided of computer has very important realistic significance 因此，研究计算机条件下的多媒体电子兵要地志具有十分重要的现实意义。
Legislation to prevent continuous and prolonged noise nuisance from unnecessary activation of vehicle burglar alarms was implemented in april 1997 防止汽车不必要地长时间不断发出防盗警报的法例，已在一九九七年四月实施。
