-----------------------------------
最近， さいきん
1. recently, lately, these days, nowadays, right now
2. nearest, closest
tbd
-----------------------------------
減る， へる
1. to decrease (in size or number), to diminish, to abate
减少(数量或规模)，缩减，减弱
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
