So he and his colleagues tested a range of chemicals found in fertilizers, including nitrate, ammonium and urea, to determine their effects on the algae.
他和同事们研究了肥料中的一系列化学物质,包括硝酸盐,铵和尿素,观察他们对海藻的影响。
2
It was travelling within Mexico, en route from an explosives plant to a mine, with a cargo of 25 tons ofammoniumnitrate. The wreckage exploded in a giant fireball, killing more than 30 people.