advanced
having a high level of complexity or skill, requiring a deep understanding of fundamental concepts
先进的
[形容词]
challenging
requiring significant effort, skill, or determination to overcome or accomplish successfully
具有挑战性的
[形容词]
problematic
presenting difficulties or concerns, often requiring careful consideration or attention
有问题的
[形容词]
indistinct
not easily defined, perceived, or understood due to a lack of clarity or precision
模糊
[形容词]
incoherent
(of speech or written discourse) unclear or poorly organized in a way that is not comprehensible
不连贯的
[形容词]
nebulous
lacking a clear definition or content, making it hard to understand or define precisely
模糊的
[形容词]
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