As water levels fall, salinity goes up, leading to fish kills.

而且水位下降，含盐量的上升使得鱼类死亡。

At first, the government said the cause of the fish kill could be a " red tide."

政府起先称鱼类死亡可能是赤潮引起的。

The fish kill has affected 200 kilometers of coastland in four provinces, with no known cause.

鱼类死亡已经波及越南4个省份长达200公里的沿海区域，原因尚不明确。

An official investigation has found no links between the fish kill and a steel plant operating along the coast.

政府调查发现，并无直接证据表明鱼类大量死亡与沿海的钢铁厂有关。

Tran Hong Ha, the top environmental official, apologized for the government's reaction to the large fish kill.

越南环保局高层Tran Hong Ha对政府应对此次大型鱼类死亡事件表示歉意。

Last week, Vietnamese officials said they failed to find evidence linking the fish kill to the factory.

上周，越南官员表示，并未有证据表明鱼类死亡和这家工厂有关。

The government also said that the fish kill could have resulted from chemicals released by humans.

政府还表示鱼类死亡可能是由人类排放的化学物质造成的。

It`s known as a " fish kill" or a fish die off.

它被称为“鱼杀” 或鱼死。

One wildlife official in the state says fish kills happened all the time all over Florida.

该州的一名野生动物官员说， 鱼类死亡事件在佛罗里达州随处可见。

The Florida Fish and Wildlife Research Institute says the fish kills happen all the time all over the state.

佛罗里达州鱼类和野生动物研究所表示， 鱼类死亡事件在全州时有发生。

" Fish kills like this are common in the summer when temperatures increase, " the department said in a statement. " If there isn't enough oxygen in the water, fish can't 'breathe'."

得州公园和野生动物厅在声明中称：“夏天温度升高时这种鱼群死亡事件很常见。如果水中没有足够氧气，鱼就不能‘呼吸’。”