1. The term "sign" refers to indications, symbols, signs, gestures, signposts, signatures, and silent cues. It is primarily used as a noun, but can also function as a verb.
2. "Signal," on the other hand, denotes signals, passwords, fuses, flags, and other markers that convey a message or indicate something. It is also used as a noun, verb, and adjective in a sentence.
3. The word "sign" is commonly employed in mathematical or physical notation, serving as a symbol to represent concepts or quantities.
4. "Signal" is a method of conveying information to a process, much like a building manager slipping a note into a tenant's mailbox.
5. He motioned to the waiter to bring the menu. (Original)
他向服务员示意要菜单。 (Revised)
6. The conductor signaled the orchestra to stand up. (Original)
指挥向乐队示意让他们起立。 (Revised)
7. Jim signaled his inability to leave the party to Mary. (Original)
吉姆无法离开聚会时，他用眼神向玛丽示意了无奈。 (Revised)
8. She wore a silver peace sign pendant on a chain around her neck. (Original)
她脖子上挂着一条银质和平标志项链。 (Revised)
9. She placed her index finger to her lips as a silent request for quiet. (Original)
她将食指放在嘴唇上，示意大家安静。 (Revised)
10. He presented his wife with a ring as a symbol of his affection. (Original)
他用一枚戒指作为爱情的象征送给他妻子。 (Revised)
