一直未解决的问题
A problem that has never been solved
以上为机器翻译结果,长、整句建议使用 人工翻译 。
土体原位测试在工程勘察中应用很广,但其应用范围主要是地区性的还是全国性的一直是个未解决的问题。
In-situ test on soils has been widely used in engineering investigation, but whether its application is of regional or of universal is still open to discussion.
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