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あれこれ， かれこれ， ひし， アレコレ， 彼是， 彼此
1. this and that, this or that, one thing or another, this way and that
2. around, about, round about, roughly, nearly, almost
tbd
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疑う， うたがう
1. to doubt, to distrust, to be suspicious of, to suspect
怀疑，不信任，心存疑虑，怀疑
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
