Phthalanil
N-邻苯二酰苯胺
🗣️ 情景例句
Practice tenses as much as possible.
操练各种时态。
Without hope, the heart would break.
如无希望，心就破碎。
And if, with the decay of vitality, weariness increases,
再者，随着精力的衰退，老年人的疲惫感会增长，