seed (n.) 种子、核 例句：I accidentally bit into the hard seed at the center of the peach. 我不小心咬到了这个桃子的核。 ups and downs高低、起伏、苦乐 例句： He has experienced the ups and downs of life.他经历过人生的苦乐。 So far, so good. 到目前为止还好。  对话： A: How do you like your new job? B: Pretty good. I enjoy it. A: How are you getting along with your colleagues? B: So far, so good. They are really nice people. A：你觉得新工作怎么样？ B：不错。我喜欢。 A：你和你的同事相处的怎么样？ B：到目前为止很好。他们都是很好的人。

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