Sometimes they are very happy, and sometimes they are sad.
有时候他们很高兴，他们有时是悲伤的。
Sometimes she's happy, sometimes she's sad. Such feelings are all part of her daily round.
她时而喜，时而悲，成天就在这种悲喜无常的情绪中度日。
Sometimes she's happy, sometimes she's sad. Such feelings are all part of her daily round.
她时而喜，时而悲，成天就在这种悲喜无常的情绪中度日。
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