complaining
v. 抱怨；（诗、文）悲叹；投诉；（机器因拉力或压力）咯吱作响（complain 的现在分词）
adj. 抱怨的
例句
For once, Dad is not complaining.
就这一次，爸爸没有抱怨。
《柯林斯英汉双解大词典》
My first attempts at complaining were kind of tentative.
我头几次的投诉尝试都有点儿犹豫。
Hillsden was complaining of a cramp in his calf muscles.
希尔斯登一直在抱怨他小腿肌肉抽筋。
