The radio station airs a Japanese course three times a week.这家无线电台每周播送日语课三次。He's trying to find out about Japanese classes in the area.他正试图搞清楚这一领域有什么日语课程可以修读。He used to spend hours at her house on the pretext of giving her Japanese lessons.他过去经常以给她上日语课为借口，在她家逗留好几个小时。