0 a sentence out of Encyclopea Britannica, talking about a wood cutting tool:02br 02br 00"Saw developed with smelted copper, from which a blade could be cast. "02br 02br 00how do you understand the word 'developed'?02br 02br 00does it mean that the technology of making saws developed along side with that of the technology of copper smelting?02br 02br 00or it only says that a saw was made of smelted copper?02br 02br 00in any case, the word 'develop' gives me the most of trouble.02br 02br 00with all respect, i thought EB is supposed to be easy to understand.0-
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0 The true saw, a blade with teeth, one of the first great innovations of the Metal Age, was a completely new tool, able to cut through wood instead of merely gashing the surface. 01font00It developed with smelted copper, from which a blade could be cast. 02font00Many of the early copper saws have the general appearance of large meat-carving knives, w