1. Toolbelts free both hands and lessen the risk of dropping hammers. 工具带解放了双手,并减少了锤子掉落的危险。
2. Tools will be available—spades and hammers, that kind of thing. 我们会提供工具:铲子和锤子等等。
3. We don't have the strength of chimpanzees because we've given up animal strength to manipulate subtle instruments, like hammers, spears, and later pens and pencils. 我们没有大猩猩的力气,因为我们放弃了动物的力量转而操纵精密仪器,如锤子、长矛,又如后来的钢笔和铅笔。