The resulting damage to one of Japan's nuclear power plants has resurrected old debates about the safety and soundness of nuclear technology and its ability to be used as a viable power source.

日本核电站遭受重创已使长久以来的一大争议再度重燃，即核技术的安全性、可靠性及其是否能用作可行的电力来源。

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In February 2016, the US National Transportation Safety Board issued a warning about lithium batteries in aeroplane cargo, describing them as "a fire and explosion ignition source".

2016年2月，美国国家运输安全委员会发布了一条关于飞机货物中锂离子电池的警告，将其描述为“引发火灾和爆炸的来源”。

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And money sent home from overseas workers has also declined significantly, threatening a source of income that has functioned as a "social safety net" for millions of people, says McKechnie.

McKechnie指出，境外工人向家中的汇款也大幅减少，对数百万人口倚重的社会保障类收入来源构成了威胁。

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For many investors in Asia, gold's role as a source of safety and value has been reinforced over the past year of economic uncertainty.

VOA: standard.2010.07.21

The State Department website is also a good source for safety information.

FORBES: How To Prepare For A Move Overseas

It's an open source approach to drug safety.

FORBES: Open-Source Drug Safety?

Safety features are designed to keep any source of heat or electricity from igniting this explosive brew.

CNN: Six months later, still no answer to TWA Flight 800 mystery