Question

subtle 【SUBTLE】Her subtle smile made him curious. 她淡淡的一笑使得他好奇。【重点词汇】subtle adj. 精致的, 淡的 n. subtlety

Accepted Answer

['sʌtl] 
subtledifficult to detect or grasp by the mind or analyze
Something that is subtle is not obvious: a professional food taster might be able to perceive subtle differences of flavor that most people don't notice.
Subtle is used for things that are hard to describe because of their complexity or delicacy: a way of thinking, arguing, or creating a work of art.  The word is pronounced like "suttle" and it was originally spelled that way when it was borrowed from Old French, but the b got imported to make the word look more like its ultimate source, the Latin adjective subtilis. If you try to pronounce the b, your ignorance of how to say the word properly won't be very subtle!
All forms of 'subtle' will appear on average once every 229 pages.subtilisesubtilizesubtlesubtletysubtlyunsubtle

Front	subtle
Pron	['sʌtl]
Back	【SUBTLE】 Her subtle smile made him curious. 她淡淡的一笑使得他好奇。【重点词汇】 subtle adj. 精致的, 淡的 n. subtlety
Vocab	subtledifficult to detect or grasp by the mind or analyze Something that is subtle is not obvious: a professional food taster might be able to perceive subtle differences of flavor that most people don't notice. Subtle is used for things that are hard to describe because of their complexity or delicacy: a way of thinking, arguing, or creating a work of art. The word is pronounced like "suttle" and it was originally spelled that way when it was borrowed from Old French, but the b got imported to make the word look more like its ultimate source, the Latin adjective subtilis. If you try to pronounce the b, your ignorance of how to say the word properly won't be very subtle! All forms of 'subtle' will appear on average once every 229 pages. subtilise subtilize subtle subtlety subtly unsubtle

Subtle Word B Sʌtl Smile Made Curious 她淡淡的一笑使得他好奇