We had to abandon our abortive attempts.

我们的尝试没有成功，不得不放弃。

The pilot refused, making three abortive attempts to land before hitting tree-tops on the fourth try.

飞行员拒绝了，在三次着陆失败后正要尝试第四次时，撞上了树顶。

There were several abortive attempts to make them in the 1990s, but big computer-makers soon dropped them for fear that they might undermine sales of traditional laptops.

上世纪90年代，人们几次尝试制造它，都半途而废，大的电脑制造商惟恐这种电脑对传统电脑业务造成冲击，因此很快就放弃了制造它们的念头。