But some problems about the white bole efficient utilization have not been solved thoroughly.
但对碱回收的白泥有效利用问题没能彻底的解决。
Though the world boasts the 50-year's history of study on vehicle steering wheel shimmy, and many valuable articles have been published meanwhile, the problem of shimmy is still not solved thoroughly.
虽然国内外对摆振现象的研究已有近五十年的历史，并发表了许多有价值的文章，但是摆振问题仍没有彻底解决。
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