口， くち
1. mouth
2. opening, hole, gap, orifice
3. mouth (of a bottle), spout, nozzle, mouthpiece
4. gate, door, entrance, exit
5. speaking, speech, talk (i.e. gossip)
6. taste, palate
7. mouth (to feed)
8. opening (i.e. vacancy), available position
9. invit...
口，嘴；开口，洞口，缝；(容器，瓶)口；门口，入口；口味，嗜好；数量词(几口、份额等)
で
1. at, in
2. at, when
3. by, with
4. within, in
5. and then, so
6. and, then
7. let me tell you, don't you know
表示范围
は
1. indicates sentence topic
2. indicates contrast with another option (stated or unstated)
3. adds emphasis
指示句子的主题；表示与另一选项（无论是否明确提及）形成对比；表示强调
