"知至"是个多义词，它可以指知至（词语）,知至（人物）。
我知，如若加至90转，主机可能超负荷，85转，可以吗？
I know, if increasing to 90rpm, main engine may be overload, 85 RPM, ok?
历卒江州，知杭州，官至朝请大夫。
Death Jiangzhou calendar, known Hangzhou, the official Korean please the doctor.
据于理吾知彼忧心之枉置矣：若储蓄不足，则经济必不至低落。
We know as a matter of principle that these concerns are misplaced: if there were a shortage of savings, the economy wouldn't be depressed.
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