美国新建核反应堆的蹒跚脚步看来肯定会受阻，很重要的一个原因就是是新的担心意味着成本增加。

America's faltering steps towards new reactors look sure to be set back, not least because new concerns will mean greater costs.

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宝宝迈出了最初的蹒跚的脚步。

The baby took its first uncertain steps.

《牛津词典》

达力几乎是笑了笑，然后蹒跚地走出客厅。哈利听见他沉重的脚步踏在砾石车道上，然后砰的一声，车门关上了。

Dudley nearly smiled, then lumbered from the room. Harry heard his heavy footfalls on the graveled drive, and then a car door slammed.

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