立彬の日本語
彼女は理科を勉強しなければなりません。
tbd
She has to study science.
922
-----------------------------------
彼女， かのじょ
1. she, her
2. girlfriend
她；女朋友
-----------------------------------
理科， りか
1. science (inc. mathematics, medicine, etc.), natural science
2. science department (university), science course
3. science (as a school subject)
tbd
-----------------------------------
を
1. indicates direct object of action
2. indicates subject of causative expression
3. indicates an area traversed
4. indicates time (period) over which action takes place
5. indicates point of departure or separation of action
6. indicates object of d...
表示动作的直接对象；表示经过的场所；表示离开或分开的点
-----------------------------------
勉強， べんきょう
1. study
2. diligence, working hard
3. experience, lesson (for the future)
4. discount, price reduction
学习
-----------------------------------
なければならない， なければなりません， なければいけない
1. have to do, must, should, ought to
必须，应该
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
