英文: The present paper reviews the construction and constitutes of pollen
tube wall, the migration of generative cell and vegetative nucleus, as well as the movements of organelles and secretory vesicles in pollen tubes.
中文: 本文就细胞壁的结构及组成，生殖细胞和营养核的移位，细胞器以及分泌小泡的运动等方面作了较全面论述。
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英文: When
tube wall strength can not bear inner steam pressure in the tube, blowout of low-temperature tube occurs.
中文: 当
管壁强度无法承受管内蒸汽压力时，导致低温过热器管爆裂。
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