https://online2.tingclass.net/lesson/shi0529/0009/9907/690.mp3
https://image.tingclass.net/statics/js/2012
know-how 訣竅，專有技術(shù)，實(shí)際知識，專門技能
They taught us all their technical know-how.
他們把技術(shù)訣竅都傳給了我們。
I'm looking for some gardening know-how.
我正在搜索園藝的相關(guān)知識。
