The big, empty and abortive pollen grains are observed at the stage of uninuclear microspore.
单核期
小孢子出现壁
育不良和巨大及空花粉现象。
,
败，
育不
，展不完，不 育
，引起流产，小产；(未成熟就)提前生败地败;,注定要遭受罚;, 
益;;败，不成功;;;;;The big, empty and abortive pollen grains are observed at the stage of uninuclear microspore.
单核期小孢子出现壁育不良和巨大及空花粉现象。
It would be an abortive effort to try to close this wide price gap.
设法缩小这样大价格差距将是徒劳。
That was an abortive attempt.
这是一种
败尝试。
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