(located) at; (to be) in; to exist; in the middle of doing sth; (indicating an action in progress)[cedict]
要求
yāo qiúㄧㄠ ㄑㄧㄡˊ
request; require; stake a claim (to something); to ask; to demand[cedict]
时间
shí jiānㄕˊ ㄐㄧㄢ
time; period[cedict]
内
nèiㄋㄟˋ
inside; inner; internal; within; interior[cedict]
掌握
zhǎng wòㄓㄤˇ ㄨㄛˋ
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]
双簧管
shuāng huáng guǎnㄕㄨㄤ ㄏㄨㄤˊ ㄍㄨㄢˇ
double reed wind instrument (such as oboe or bassoon)[cedict]