This is the 1689th most frequent Chinese word.
二手车
"Second-hand car" or "used car."
Here, '二手车市场' means 'used car market,' describing the market segment dealing with pre-owned vehicles.
二手车市场最近变得非常活跃。
The used car market has become very active recently.
The word '二手车' is applied to describe the choice of driving pre-owned cars as a cost-saving solution.
许多人选择开二手车以节省费用。
Many people choose to drive used cars to save costs.
The term '二手车' (used car) is used here to indicate a pre-owned vehicle that the speaker is thinking of purchasing.