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。

The big,empty and abortive pollen grains are abserred at the stage of uninuclear microspore.

单核期小孢子出现壁发育不良和巨大及花粉现象。

That was an abortive attempt.

这是一种败尝试。