The hydroperoxides are unstable compounds.氢过氧化物是不稳定的化合物.After the fall of Pitt in 1801 there was a decade of unstable government...1801年皮特倒台后，政府经历了10年的动荡。The erratic fluctuation of market prices is in consequence of unst...
The President's unescorted vehicle was ambushed just outside the capital.刚出首都，总统无人护卫的汽车就遭到了伏击。There was a scream of brakes from the carriageway outside.外面车行道上传来刺耳的刹车声。The outside air was heavy and moist and sultry.外...