Canaries no longer in coal mines for a reason. The threat of poisonous gas leakages, explosions and collapsing shafts has lessened in recent decades as the industry, led by multinational companies, has improved safety.
煤礦里不再有金絲雀了，這是有原因的。近幾十年內，毒氣泄漏、爆炸和礦井塌方的威脅已經減小，因為在跨國公司的帶領下，采礦業已經提高了安全性。
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