investment along proper lines的用法和樣例：
例句
- For risk-averse investors, the bond market is still concerned about the direction of one of the investment.
對於厭惡風險的投資者而言，債市仍然是值得關注的投資方向之一。 - We need to resolutely work to reorient investment by shifting the government's priority in infrastructure investment to the countryside.
要下決心調整投資方向，把國家對基礎設施建設投入的重點轉向農村，這是一個重大轉變。
