以下是译林版五年级英语第六单元的知识点：

1. 重点词汇和短语：parent, cousin, uncle, aunt, doctor, nurse, job, hospital, firefighter, teacher, student, singer, dancer, farmer, worker, driver, cook, policeman, policewoman, grow, help, sick, dangerous, exciting, difficult, interesting, important, kind, hard-working, brave, strong, fire, afraid, drive, cook, teach, sing, dance, grow crops, get well, put out fires, drive a bus, fly a plane, help sick people, catch criminals

2. 句型：What does your father/ mother do? He/ She is a doctor/ nurse. What do you want to be? I want to be a teacher/ singer. Why? Because it's interesting/exciting.

3. 语法：一般现在时的用法，包括肯定句、否定句和疑问句。

4. 职业和工作场所的词汇和表达方式。

5. 用英语描述家庭成员的职业和工作内容。

6. 了解不同职业的特点和重要性。

这些知识点可以帮助学生掌握英语中的职业和工作相关的词汇和表达方式，同时提高他们的听说读写能力。