indentured labor

例句：

1. 1. The indentured laborers were forced to work long hours in the mines.
   受奴役的劳工被迫在矿井里长时间工作。
2. 2.The government promised to improve the living conditions for these indentured laborers.
   政府承诺改善这些受奴役劳工的生活条件。
3. 3. Many indentured laborers escaped from their captors and sought asylum in neighboring countries.
   许多受奴役劳工逃离了他们的奴隶主，并寻求邻国庇护。