Through experiment this paper analyses the signals of the gear box, then comparing with the model curve of the different conditions in order to distinguish the operating trouble of the gear box.

结合实验对齿轮箱信号进行时间序列分析，对比各种工况下的模型曲线，识别齿轮箱的运行故障。

youdao

Many firms operating brick and mortar stores are in trouble.

许多经营实体店的公司都陷入了困境。

youdao

The doctor went on to say that she would have a 40 percent possibility of having a heart trouble during the operation, a 35 percent possibility of being unable to stand up, and even 20 percent of dying on the operating table because of her old age.

医生接着说，在手术过程中，她有40%的可能性出现心脏问题，35%的可能性站不起来，甚至有20%的可能性因为她的年纪而死在手术台上。

youdao

Among other reactions, Chinese newspapers suggested that some government ministries were withdrawing official support of Windows in favor of the Linux operating system, touted as having an outside chance of causing trouble for Windows in developing-country markets.

CNN: Brickbats for Bill

But critics of the Indonesian government have been outraged that militias are still operating in the Indonesian half of the island, and occasionally cross into East Timor to make trouble.

ECONOMIST: Indonesia trades promises for money

Trouble is there are literally dozens some would say hundreds of Groupon clones operating already in China.

FORBES: Groupon's Foray Into China Sounds Like a Disaster