She wore a pert little hat.

她戴著一顶雅致的小帽子。

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She is wearing a pert little hat.

她头戴一顶小巧别致的帽子。

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She is a pert child.

她是一个冒失的孩子。

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In the PERT network, a project is composed of many tasks.

在网络计划问题中，一项大的工程由许多工序合成。

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In the PERT network, a project is composed of many tasks.

在网络计划问题中，一项大的工程由许多工序合成。

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