工具的选择也很重要，但不应该让工具主导流程。
Immigration boosts innovation and wages in the US. The positive dynamic impact of immigration on innovation and wages dominates the short-run negative impact of increased labor supply. Increased immigration to the US since 1965 is estimated to have increased innovation and wages by 5%.
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If you find yourself stuck at any step of today's Hurdle, don't worry! We have you covered.
for t := range c {