complicated
involving many different parts or elements that make something difficult to understand or deal with

复杂的, 困难的

[形容词]
dilemma
a situation that is difficult because a choice must be made between two or more options that are equally important

进退两难

[名词]
to chase
to follow a person or thing and see where they go, often for the purpose of catching them

追赶, 追踪

[动词]
to discover
to be the first person who finds something or someplace that others did not know about

发现, 找到

[动词]

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