词汇点睛
time n.时期，时代
[观察]This saves plenty of time.这节省很多时间。
Books allow me to learn about people in different times and places.书让我了解不同时代和地方的人。
l have been to Beijing three times.我去过北京三次。This sitting room is 3 times as large as the kitchen.客厅的面积是厨房的三倍。

through prep.以，凭借
[观察]You can learn English through the Internet.你可以通过网络学习英语。
[探究] through作介词，意为“穿过;通过;从头至尾;遍及”﹔through还可作副词，意为“穿过;自始至终;完全”。