投诉率的英文：
Complaint Rate
n. 抱怨；抗议；控告
Viewers jammed the switchboard with complaints.
打电话投诉的观众是总机应接不暇。
I recounted Egyptian complaints.
我重述了一下埃及方面的不满意见。
He was irritated by their perpetual complaints.
他们不断发牢骚把他惹火了。
Students made a rash of complaints.
学生们发出一片抱怨声。
To relay any customer complaints to supervis.
处理并向主管汇报客人的投诉。
n. 比率，速率；费用
v. 评估；认为；划分等级；值得
cumulative rating
累积收听率
These bonds have an AAA rating.
这些债券的信用度是3A级的。
To rate too low;underestimate.
低估对…估价太低；低估
A Lump Sum Rate of ...
费用合计…
To reduce in rank or rating;demote.
使降级降低级别或降级；使人降级