I posted a question on the message board.
我在留言板上贴出了一个问题。
Composition alone can't give you the answer to the question of why is the plywood superior to the solid pine board.
只用组成成分无法解答为什么胶合板要优于松木板这个问题。
He drew diagrams on the board and sometimes one of us asked another question to keep him talking.
他在黑板上画图表,有时我们中有人会再问问题,让他继续讲下去。
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