A lot of Ukraine's main battle tanks are as old as this one.

乌克兰的很多主战坦克都和这辆一样老。

That's why the military says they urgently need those new Western main battle tanks.

所以军方说他们迫切需要这些新的西方主战坦克。

A police officer said the leak occurred in a pipe connecting the oxygen supply to the main tank in the hospital complex.

一名警官说，泄漏发生在医院综合楼的一根连接氧气供应与主要氧气罐的管道中。