沃尔什露齿一笑。Walsh bared his teeth in a grin.她露齿一笑表示高兴.She grinned her delight.她看起来是客客气气的,一旦脾气发作起来,就张牙露齿不那么客气了.She had always seemed friendly until suddenly she began to show her teeth....

“露齿”的英语可以翻译为：grinningly ...