-----------------------------------
ながら， 乍ら
1. while, during, as
2. while, although, though, despite, in spite of, notwithstanding
3. all, both
4. as (e.g. "as always", "as long ago"), in (e.g. "in tears")
5. while doing something else (at the same time)
同时，……期间，一边……一边
-----------------------------------
言う， 云う， 謂う， いう， ゆう
1. to say, to utter, to declare
2. to name, to call
3. to go (e.g. "the alarm went ping"), to make a noise
说，宣读，声明；称呼；发出(例如：警报响了‘叮’的一声)，发出声响
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
