例句：
The central bank should also serve as as a lender of last resort to the money market.
中央銀行應(yīng)該在金融市場(chǎng)中扮演最終貸款人的角色。
PHP has an array type that doubles as as a simple list and a dictionary or hash; Python separates the two.
PHP的數(shù)組類型可同時(shí)支持簡(jiǎn)單列表和字典或散列，但Python卻將這兩者分開(kāi)。
Think of it as as if you were buying an expensive car: a test drive is crucial before making a final decision.
例如，你想買(mǎi)一輛高級(jí)轎車(chē)，下決心前的試驗(yàn)駕駛就是至關(guān)重要的。