1. crack a smile 展顏微笑，莞爾一笑

　　Definition: to smile, especially when you do not feel like smiling.

　　The man was willing to do anything to make his wife crack a smile. （為了讓他的妻子展顏微笑，他愿意做任何事情。）

　　2. laugh a hearty laugh/laugh heartily 放聲大笑，開懷大笑

　　Definition: to laugh loudly and uncontrollably

　　Upon hearing that he had won the lottery, the man laughed heartily. （知道自己中獎了，這個男人開懷大笑。）

　　3. force a smile 強(qiáng)作歡顏

　　Definition: to smile even though you feel sorrowful or unhappy

　　At the funeral, he forced a smile for anyone who offered condolences. （在葬禮上，他強(qiáng)顏歡笑面對前來吊唁的人。）

　　4. a saccharine smile 諂笑，諂媚的笑

　　Definition: a smile designed to please others

　　When he talks to his boss, he puts on a saccharine smile. （他跟老板說話的時候，滿臉都是諂媚的假笑。）

　　5. smile bitterly 苦笑

　　Definition: to smile when you have no choice or can do nothing to help

　　The student smiled bitterly when his teacher caught him copying his homework. （抄作業(yè)被老師抓到后，這個學(xué)生滿臉苦笑。）