不首先使用 (bat1 sau2 sin1 sai2 jung6) — no first use in Cantonese
batˉ¹不sauˊ²首sinˉ¹先saiˊ²使jungˍ₆用Mandarin Pinyin: bu4 shou3 xian1 shi3 yong4
Meaning of 不首先使用
nounno first use
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