文具盒里有一块橡皮和一把直尺吗？

The pencil-box is a rubber and a ruler?

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桌上有一支钢笔，一把直尺和两本书。

There is a pen, a ruler and two books on the desk.

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雅各习惯用一把直尺划直线。

Jacob used a ruler to draw straight lines.

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我有一把直尺。能行吗？

I have get a ruler. Will that do?

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我有一把直尺。能行吗？

I have got a ruler. Will that do?

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这是一把直尺吗？

Is this a ruler?

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一种便携式观测仪器，主要包括安放在三脚架上的绘图板和一把直尺，用于观测和绘制地形详图。

A portable surveying instrument consisting essentially of a drawing board and a ruler mounted on a tripod and used to sight and map topographical details.

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一种便携式观测仪器，主要包括安放在三脚架上的绘图板和一把直尺，用于观测和绘制地形详图。

A portable surveying instrument consisting essentially of a drawing board and a ruler mounted on a tripod and used to sight and map topographical details.

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