practice/ 'præktɪs /

1.noun [c] 
(custom) 习俗

2.noun [c/u] 
(way of operating) 惯例

3.noun [u] 
(not theory) 实践

4.noun [u] 
(exercise,training) 练习

5.noun [c] 
(training session) 实习

6.noun [u] [of religion] 
信奉活动

7.noun [医] [ 法] 
(business) 从业

8.noun [u] 
(work) 工作

9.vt.,vi.
see practise

it's normal {or} standard practice
 [US] 这是通常{或}标准做法
in practice
实际上
to put sth into practice
应用某事
to be out of practice
荒疏
2 hours' piano practice
2小时的练琴时间