Part of the trick was to find a suitable photochromic material whose clear and opaque parts would remain stable after the initial exposure to light.

成功实现这一过程的部分关键在于找到合适的光敏材料，其在最初曝光之后透明与不透明区域都应保持稳定。

youdao

Increased emissions of sulphur from Chinese coal burning may be part of the reason why global temperatures were fairly stable over the past decade.

在过去十年间，中国煤炭燃烧持续排放的硫可能是全球气温保持相对稳定的部分原因。

youdao

Rwanda is now one of the safest and most stable countries in this part of Africa.

卢旺达现在是非洲这个区域最安全、最稳定的国家之一。

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But the political leadership does not want that. "So a part of the strategy is building up those elements in Pakistan that understand that having a stable and peaceful relationship with Afghanistan is actually in Pakistan's national security interest,"

VOA: standard.2009.12.06

Is that the "safe and secure" part -- "safe and stable partner" part?

WHITEHOUSE: Press Briefing

The stable part of the Euro is really then Germany, Austria, Finland and the Netherlands - four "core" solvent countries.

BBC: Italy: 'Hang on lads, I've got a great idea��'

And for those relatively stable Part D premiums seniors get much greater access to newer, brand name drugs than Medicaid beneficiaries.

FORBES: Medicare Part D, Not Medicaid Rebates, Is the Model for Reform