Before using objects like rows and cells, be sure to test them to make sure they are not null.

在使用行和单元格这样的对象之前，一定要测试它们，确保它们不为空。

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Make sure that any objects that need to be explicitly closed or returned to the pool are so done.

对于任何需要显式关闭的或需要返回到池中的对象，请确保进行了这样的操作。

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If an organization sets standards for which shapes are to represent different objects in a process, there is no way to error check to be sure that the shapes are used correctly.

如果组织设置了相应的标准，规定哪些形状表示流程中的不同对象，则没有办法进行错误检查，无法确定形状是否使用正确。

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Somewhere among all that they can be sure of coins, gold and silver bullion and objects made of metal of various kinds.

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The Atrix HD is packed with more radios than you can throw a stick at -- to be fair, we're not sure why you would want to lob thin wooden objects at a set of antenna anyway.

ENGADGET: Motorola Atrix HD review Mobile

Although the age of the objects has been identified, archaeologists said they were not sure how they came to be where they were found.

BBC: Cornish Bronze Age hoard goes on display