“试用”怎么读

“试用”的英语可以翻译为：on trial，try out，on probation，probation，tryout ...

在又试用了4个月后，她被开除了。After a further four-month extension of her probation period, she was sacked.目前正在人类志愿者身上试验12种试用疫苗。Twelve potential vaccines are currently being tested on human volunteers.该系统正在很多大学试用。This system is being ...