“一拳”的英语？

我儿子大发脾气，一拳捶在了地上。My son had a tantrum and banged his fist on the ground.安迪转过身，大步走向克里斯，一拳把他击倒在地。Andy turned round, marched over to Chris and just laid him out.他设法挣脱出一只手来挡住了一拳。He managed to free one hand to ward off a punch...