Can be transferred to children unconditionally, right of life, but not in vain efforts.

可无条件将经营权转让给子女，一生的努力不致白费，而且免税。

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They beheld Madeleine, almost flat on his stomach beneath that terrible weight, make two vain efforts to bring his knees and his elbows together.

大家看见马德兰几乎平伏在那一堆骇人的东西下面，两次想使肘弯接近膝头，都没有成功。

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All our efforts were in vain.

我们的所有努力都付诸东流了。

《牛津词典》

Before the crisis, vain efforts were made to encourage local banks to merge.

ECONOMIST: Banking in Malaysia: Next in line? | The

But his efforts were in vain as his side lost their last five wickets for 17 runs, with Sujeewa de Silva and off-spinner Thilan Samaraweera claiming four wickets apiece.

BBC: Clean sweep for Sri Lanka

That signalled something of a collapse with Akmal, Tanvir and Rehman all falling in quick succession and though Butt continued to smash the ball around the park, his efforts were in vain.

BBC: By Jonathan Stevenson