to grasp (often fig.); to master; to know well; to understand sth well and know how to use it; fluency; to control; to seize (initiative, opportunity, destiny)[cedict]
正确
zhèng quèㄓㄥˋ ㄑㄩㄝˋ
correct; proper[cedict]
运用
yùn yòngㄩㄣˋ ㄩㄥˋ
to use; to put to use[cedict]
杠杆
gàng gǎnㄍㄤˋ ㄍㄢˇ
lever; pry bar; crowbar[cedict]
原理
yuán lǐㄩㄢˊ ㄌㄧˇ
principle; theory[cedict]
的
deㄉㄜ˙
díㄉㄧˊ
dìㄉㄧˋ
of; structural particle: used before a noun, linking it to preceding possessive or descriptive attributive[cedict]
really and truly[cedict]
aim; clear[cedict]
窍门
qiào ménㄑㄧㄠˋ ㄇㄣˊ
a trick; an ingenious method; know-how; the knack (of doing sth)[cedict]