The process is cumbersome, expensive, and unreliable.

签证申请手续冗长，费用昂贵，而且很不靠谱。

Some things break entirely, and other things start getting sticky, slow, and just plain unreliable.

一些齿轮若是坏了，其它的就会变慢，甚至影响工作。

Like all history books, though, they can be unreliable.

然而就和所有的史书一样，年轮也并不怎么靠谱。

But sorrow is unreliable in that way.

但这种形式的悲伤是不可靠的。

Stupid, unreliable vampire, I thought to myself.

愚蠢，不可靠的吸血鬼，我自忖着。

However, he can be a little unreliable sometimes.

但是，他有时候会有点不靠谱。

Their main complaint is the unreliable electricity supply.

他们最为不满的是（平壤）时断时续的电力供应。

Phone lines without electricity would be unreliable, too.

没有电的电话线路也不可靠。

They are expensive to acquire, unreliable and fiddly.

网络武器成本高，可靠性低，且因太过精细而难以操作。

The Bluetooth is still so unreliable.

但蓝牙还是那么靠不住。