a duty to act mercifully towards animals仁慈对待动物的责任

Mercifully a friend came to the rescue.幸好一位朋友前来解围。

He let fire with a shotgun, mercifully killing no one.他手里拿着的一支猎枪走了火, 所幸没有伤人命。

It was a mercifully short conflict.幸运的是, 那是一场短暂的冲突。