Lead found in these materials is subject to very little leaching over the life of an appliance or crown.

这些材料中的铅在牙冠和器具的正常使用下几乎是不会渗出来的。

youdao

However the magnetic excitations in these materials, like phonon, will likely couple with incident photons and hence an inelastic light scattering process can occur.

然而这些介质中的磁性激发和声子一样是能够与入射光发生作用，造成非弹性散射的。

youdao

The experiments described in these materials are potentially hazardous and require a high level of safety training, special facilities and equipment, and supervision by appropriate individuals.

在这些资料中所描述的实验是有潜在危险的，而且要求有高度的安全训练、特别的设施和装备，且要有适当的人员监督下才能进行的。

youdao

During the next twelve months the team will study the effectiveness of these materials in home building.

VOA: special.2009.10.05

And you'll be teaching these materials to other people -- any material that you are interested in in your presentation.

你们将把这些材料教给别人-,任何在你的陈述中你所感兴趣的内容。

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We don't, of course, have any original copies of these materials as they came off the pen of whoever it was who was writing them, and in fact before the middle of the twentieth century, our oldest manuscripts and fragments of manuscripts of the Bible dated to the year 900.

我们当然没有任何最早时期那些笔者的,手稿，而且事实上,在20世纪中期之前我们有的最古老的手稿,和手稿碎片都是公元900年时候的。

耶鲁公开课 - 旧约导论课程节选

There are still too many bad actors in search of these dangerous materials, and these dangerous materials are still vulnerable in too many places.

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In preparing these materials, we have relied upon and assumed without independent verifications, the accuracy and completeness of all information available from public and internal sources.

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We recognized that while different countries face different challenges, we have a mutual interest in securing these dangerous materials.

WHITEHOUSE: Nuclear Security Summit: Presidential Press Conference