toothache的发音不同。解释。1.对比发音。* &ldquo；school&rdquo；的发音为/sk&#2370；&#2354；/，即&ldquo；s&rdquo；后面跟着&ldquo；chool&rdquo；的发音。* &ldquo；kitchen&rdquo；的发音为/&#712；k&#618；t&#3；&#618；n/，即&ldquo；kit-chen&rdquo；的连读。* &ldquo；chemistry&rdquo；的发音为/&#712；kem&#618；stri/，&ldquo；chem-istry&rdquo；的连读。