talk about past ongoing activities
...he past and continue into the present(谈论从过去延续到现在的行为) Talk about past ongoing activities(谈论过去进行的活动) Talk about habitual actions(谈论习惯性的行为) ..
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talk about past ongoing activities
谈论过去正在进行的活动
以上为机器翻译结果，长、整句建议使用 人工翻译 。