Selective tracing
[計] 選擇跟蹤
?? 詞語組成解析
selective
[si'lektiv]
adj. 精心選擇的;選擇的，不普遍的;淘汰的;
n. 描摹, 描圖, 追蹤\\n[計] 跟蹤
??? 情景例句
What has kept you so busy?
什么使你這么忙？
She is in good shape.
她的身體狀況良好。
It was half past four. Everything was ready.
一切都準備好。