on the grin的用法和樣例：
例句
- The angry fire had burned up the grinning happy husband and the fat adorable babies.
那場(chǎng)火燒沒(méi)了那個(gè)笑嘻嘻的快活丈夫，那些討人喜歡的胖娃娃。 - People who confess to feeling happy also grin more than others.
承認感覺(jué)幸福的人們也會(huì )比別人更喜歡咧著(zhù)嘴笑。 - They used to walk, they used to swim, they used to fly with a toothy grin.
它們常常行走，它們常常游泳，它們常常咧著(zhù)嘴笑著(zhù)飛。
