| 例句 |
The number of workplace accidents is increasing, but it is not clear who or what is responsible.工伤事故的数量在增加，但责任人或原因不明。He was attacked for no apparent reason.他被袭击的原因不明。The cause of the accident is uncertain.事故原因不明。It isn't clear how the fire started.起火原因不明。Sudden or unexplained weight loss may be an early indication of health problems.突然的或原因不明的体重减轻可能表示健康出现问题。 |