springboard: something that helps you to become successful
A is a springboard for/to B
A fluent command of English is a springboard to professional success.
command of something：knowledge of something, especially a language, or ability to use something 掌握 精通
翻译下面的句子：
许多人认为海外留学是移民的跳板。
Studying abroad is regarded as a springboard for immigration.
（参考翻译：Studying abroad is regarded as a springboard for immigration. 或 A degree from a foreign institution is widely considered a springboard for immigration.）
