the significant
1（题词，铭文） found on an old key --“if i rest, i
2”-- would be an excellent motto for those who are
3 with the slightest bit of idleness. even the most
4（勤勉的） person might adopt it with advantage to serve as a
5 that, if one allows his
6 to rest, like the iron in the unused key, they will soon show signs of rust and, ultimately, cannot do the work required of them.
those who would
7 the heights reached and kept by great men must keep their faculties polished by constant use, so that they may unlock the doors of knowledge, the gate that guard the entrances to the professions, to science, art, literature, agriculture---every department of human endeavor.
industry keeps bright the key that opens the
8 of achievement. if hugh
9, after
10 all day in a
11, had
12 his evenings to rest and recreation, he would never have become a famous
13. the
14 15, edmund stone, would never have published a mathematical dictionary, never have found the key to science of mathematics, if he had given his spare moments to idleness, had the little
16 lad, ferguson, allowed the busy brain to go to sleep while he tended sheep on the hillside instead of calculating the position of the stars by a string of
17, he would never have become a famous
18.
19 20 all---not inconstant,
spasmodic（痉挛的）, or ill-directed labor; but faithful, unremitting, daily effort toward a well-directed purpose. just as truly as eternal vigilance is the price of liberty, so is eternal industry the price of noble and enduring success.
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