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tied-and-true是什么意思?原句是Owingtotheexposednatureofthislighthouse,however,Smeatonrevertedtothetied-and-trueRomancementandmortisedstonework.

题目详情
tied -and-true是什么意思?
原句是Owing to the exposed nature of this lighthouse,however,Smeaton reverted to the tied-and-true Roman cement and mortised stonework.
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答案和解析
Smeaton 还原了系实的罗马混凝土和榫合石方.