Half the number of bolts in floating head of deethanizer overhead cooler were brittle fractured.
气体分馏装置脱乙烷

却
浮

,半数发生脆性断裂。
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They raised 80 bean plants, infested 40 of them with aphids two weeks after germination, and then, three days later, tested samples of the hydroponic solution of each using a process called bioassay-guided fractionation.
他们种植了80株豆
植物, 在发芽两周后让其
40株受到蚜虫侵害,然后在三天后, 使用一种称为生物测定指导分馏的过程检测了每株植物水培溶液的样本。