be taken when necessary的意思|示意

Proper care must be taken to ensure that object-relational database mappings are correct, and ideally the code should be designed to minimize the changes necessary when requirements change.

必须注意确保对象到关系数据库映射的正确性，理想情况下，应该将代码设计成在需求变更时所需的更改最小。

The consequence of failure in any place may be predicted by calculation when pool fire occurs, so that necessary preventive measures can be taken.

通过计算可以预测池火灾发生时任意点处的失效后果，以便采取必要的防范措施。

When preparing elementary school test , care should be taken not to make the vocabulary more difficult than necessary .

在拟定小学的考试题目时，应小心避免词汇过难。

When the base-plates are in place and all necessary measurements have been taken, the internal aluminium profile sections can be positioned.

当基片已到位，所有已经采取了必要的测量，内部铝合金型材可定位。

Reasonable steps will be taken to delete or destroy the information when it is no longer necessary for any of the purpose above.

若不再需要用作上述任何用途，将会采取合理步骤删除或销毁有关资料。

The environment in the west of China is so flimsy that it is a necessary factor that should be taken into consideration when the west of China is exploited.

中国西部生态环境非常脆弱，对其开发必须考虑环境因素。