What is genocide? - 【SBS Examines】何謂「種族滅絕」？

'Genocide' is a powerful term — it's been called the "crime of crimes". When does large-scale violence become genocide, and why is it so difficult to prove and punish? - 「種族滅絕」（genocide）是一個非常嚴重的詞語，被形容是「罪行中的罪行」。大規模的暴力如何被定義為種族滅絕？這罪行又為何難以證明和懲罰？