It is a tight, buff, lean, and mean fighting machine.
它是一架结实、强壮、精瘦、凶狠的战斗机器。
He's a lean, mean, fighting machine.
他是一架锐不可当的战斗机器。
Jim: Honestly, Paddy, I'm going to be a lean mean fighting machine in a few weeks.
吉姆：实话说，帕迪，我准备在几个星期之后成为一台健美的战斗机器！
The keys to boosting your immune system into a "lean, mean, disease-fighting machine" lie in your lifestyle habits — healthy food, stress relief, exercise, sleep, exposure to sunlight and so on.
加强你的免疫系统成为一个“精干的、有效的、与疾病战斗的武器”的关键，取决于你的生活方式习惯—健康食品、消除压力、锻炼身体、睡眠、暴露于阳光等等。
The keys to boosting your immune system into a "lean, mean, disease-fighting machine" lie in your lifestyle habits — healthy food, stress relief, exercise, sleep, exposure to sunlight and so on.
加强你的免疫系统成为一个“精干的、有效的、与疾病战斗的武器”的关键，取决于你的生活方式习惯—健康食品、消除压力、锻炼身体、睡眠、暴露于阳光等等。
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