HSK 7-9
难怪
nánguài动副
(it's) no wonder (that...); (it's) not surprising (that)
难怪他今天显得特别高兴。
Nánguài tā jīntiān xiǎnde tèbié gāoxìng.
No wonder he looks especially happy today.
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Appears across levels (7-9) in the HSK 3.0 word list.