go out on a limb字面意思爬高枝，引申为担风险、冒险。

【例句】
Their experiences prove what we already know-that successful companies must be prepared to go out on a limb.
他们的经历证明了一个已知结论—成功的公司必须有担风险的准备。

When you go out on a limb and completely change the way you do business, it can be frightening.
当你冒险并完全改变你做生意的方式时，这可能是可怕的。