Light pen tracking
[計] 光筆跟蹤
?? 詞語組成解析
light
[la?t]
n. 光;發光體;電燈;點火器;
adj. 輕的;明亮的;淺色的;少量的;
v. 點燃;照亮;用光指引;
adv. 輕地，輕裝地;
pen
[p?n]
n. 筆，筆尖;筆法，文筆;作家;圍欄;
vt. 寫;把…關入欄中;關押，囚禁;
tracking
['tr?ki?]
n. 跟蹤;
v. 跟蹤( track的現在分詞 );跟蹤攝影;留下（臟）足跡;追隨（潮流等）;
??? 情景例句
He has a large family to feed.
他要養活一個大家庭。
Do your children go to school yet?
府上的孩子們已經上學了嗎？
Yes, that is absolutely right.
啊，對的，是應該這樣。