《律师法》对律师的定义为：本法所称律师，是指依法取得律师执业证书，接受委托或者指定，为当事人提供法律服务的执业人员。

《民事诉讼法》第五十八条规定，当事人、法定代理人可以委托一至二人作为诉讼代理人。下列人员可以被委托为诉讼代理人：

(一)律师、基层法律服务工作者；

(二)当事人的近亲属或者工作人员；

(三)当事人所在社区、单位以及有关社会团体推荐的公民。

从上述规定可看出，诉讼代理人并不等同于律师，诉讼代理人的范围比律师要广。

例句：

1. 原文：律师、社会团体、提起诉讼的公民的近亲属或者所在单位推荐的人，以及经人民法院许可的其他公民,可以受委托为诉讼代理人.

译文：A lawyer, a public organization, a near relative of the citizen bringing the suit, or a person recommended by the unit to which the citizen bringing the suit belongs or any other citizen approved by the people's court may be entrusted as an agent ad litem.

2. 原文：当事人委托律师作为诉讼代理人，必须到某个律师事务所办理委托手续。

译文：Party who entrusts a lawyer to regard lawsuit as agent, must deal with to office of a certain attorney entrust formalities.

3. 原文：代理诉讼的律师和其他诉讼代理人有权调查收集证据，可以查阅本案有关材料。

译文：A lawyer who serves as an agent ad litem and other agents ad litem shall have the right to investigate and collect evidence, and may have access to materials pertaining to the case.