立彬の日本語
彼らは計画について４時間を費やした。
tbd
They spent four hours discussing their plan.
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計画， けいかく
1. plan, project, schedule, scheme, program, programme
计划，规划
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について， に就いて
1. about, on, regarding, concerning
2. per, for every
关于
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時間， じかん
1. time
2. hour
3. period, class, lesson
时间的单位：小时；小时；时间，时刻
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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
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費やす， ついやす
1. to spend, to expend, to consume
2. to waste, to squander, to throw away
3. to devote
tbd
彼ら， 彼等， かれら
1. they, them
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
