subtle
[形容词]
difficult to notice or detect because of its slight or delicate nature
Ex: The changes to the menu subtle but effective , enhancing the overall dining experience .
tolerable
[形容词]
able to be accepted or endured without causing excessive discomfort or dissatisfaction

可容忍的, 尚可的
flickering
[形容词]
(of a flame or light) shining unsteadily or unevenly, often with quick and irregular movements of light or color

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