乔木，通常非常大和板根，很少灌木。

Trees, often very large and buttressed, rarely shrubs.

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天花板上的两根木梁松动了。

Two wooden beams had come loose from the ceiling.

《柯林斯英汉双解大词典》

每块板都钉在两根垂直的木制支撑物上。

Each slab was nailed to two straight wooden supports.

《柯林斯英汉双解大词典》

我把它上面穿了根绳子，挂在了天花板上，我高兴的看着。

I put it in the rope, hang from the ceiling, and I'm happy to look at.

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只有一根细电线连接着花板和这盏灯。

The only attachment of the lamp to the ceiling is a thin wire.

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我怀疑天花板上那根横梁的强度。

I have doubts about the strength of that beam in the ceiling.

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接下来，他用两根排线连接通过洞洞板（wire-wrap board）连接到一起。

Next, he made two ribbon cables to connect the two sockets to a wire-wrap board.

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接下来，他用两根排线连接通过洞洞板（wire-wrap board）连接到一起。

Next, he made two ribbon cables to connect the two sockets to a wire-wrap board.

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