立彬の日本語
活動していれば精神は鈍らない。
tbd
Activity keeps the mind from rusting.
281
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活動， かつどう
1. activity (of a person, organization, animal, volcano, etc.), action, operation
2. moving picture
活动，行动
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精神， せいしん
1. mind, spirit, soul, heart, ethos
2. attitude, mentality, will, intention
3. spirit (of a matter), essence, fundamental significance
tbd
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鈍る， にぶる， なまる
1. to become blunt, to grow dull
2. to become less capable, to weaken, to falter
tbd
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