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.
那場火燒沒了那個笑嘻嘻的快活丈夫，那些討人喜歡的胖娃娃。 - People who confess to feeling happy also grin more than others.
承認感覺幸福的人們也會比別人更喜歡咧著嘴笑。 - 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，它們常常咧著嘴笑著飛。
