The explosive reactions are activated when an allergen (such as pollen particles) binds to receptors on the surface of the mast cell, which then opens and secretes part of its contents.
当变应原(例如花粉微粒)粘附到肥大细胞表面受体后，将引发爆炸反应，肥大细胞裂开并且分泌出部分内含物。
For decades, scientists have known that supernovae, the explosive deaths of giant stars, trigger reactions to forge most of the heavy elements in the universe.
巨大的恒星在死亡时会产生超新星爆炸，所引发的反应，制造了宇宙中大多数的重元素，这是科学家几十年前就已经知道的。
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