m109的中文翻译为“M109自行炮”，读音为/em wn nan/.

例句：

1. The m109 self-propelled howitzer is a highly effective artillery weapon. (M109自行炮是一种高效的炮兵武器。)

2. The m109 has been in service with the U.S. Army since the 1960s. (m109自行炮自xx年代以来一直在美队中服役。)