n.不可靠（性）；不安全（性）

The old car was so unreliable that it broke down every other week.
这辆旧车太不可靠了，每隔一周就会抛锚。
Due to his unreliable behavior, no one trusts him with important tasks anymore.
由于他行为不可靠，没有人再信任他处理重要任务了。
The internet connection in this hotel is notoriously unreliable.
这家酒店的网络连接臭名昭著地不可靠。
She's an unreliable witness; her stories change depending on who she's talking to.
她是个不可靠的证人；她的说法会根据她和谁说话而改变。
The weather forecast has been completely unreliable all week.
整个星期的天气预报完全不可靠。
His promises are always unreliable – you can't count on him to follow through.
他的承诺总是不可靠的——你不能指望他会履行诺言。
The unreliable electrical system caused several blackouts last month.
不可靠的电力系统上个月导致了好几次停电。
She's an unreliable friend – she never shows up when she says she will.
她是个不可靠的朋友——她从不按照她说的时间出现。
The unreliable data made it difficult for the researchers to draw any meaningful conclusions.
不可靠的数据让研究人员很难得出任何有意义的结论。
His unreliable temper made him a difficult person to work with.
他那不可靠的脾气让他成为一个难以共事的人。