"Child Labour" according to ILO conventions, refers specifically to work that damages the health of a child, prevents school attendance and which could block future growth and development.

根据国际劳工组织的有关公约，“童工劳动”专门系指损害儿童健康、影响上学的工作，这种工作会阻碍儿童未来的生长和发育。

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So while it may seem like the new kid on the block, Derby comes with nearly ten years of development behind it.

所以虽然看起来像是新事物，但是Derby背后已经开发了几乎十年了。

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The class of drugs used by the UCLA team to block GABA receptors is currently in clinical development for other conditions, such as memory loss, and has been well-tolerated in small studies.

这类伽马氨基丁酸受体的抑制药物现正被加州大学的研究小组用于其他方面的临床研究，如失忆，并在一些小的研究上得到了广泛的认同。

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Critics say such patents block progress against disease and development of new treatments.

VOA: special.2010.03.23

American activists have been tireless in efforts to block the development of the Keystone XL pipeline project.

FORBES: Come On Already, Let's Build Keystone XL

But the residents of Kemptown, which overlooks Black Rock, are concerned the chosen development will block their view of the sea.

BBC: NEWS | UK | England | Southern Counties | Seafront plan for ice rinks approved

And going ahead with the F-22 shouldn't in any way block development and funding of unmanned vehicles, which are becoming more sophisticated and deadly.

FORBES: Magazine Article