?? 詞語組成解析
travel
['tr?vl]
n. 旅行;進行;移動;漫游;
vi. 旅行;傳送;前進，行進;[籃球]走步;
vt. 經過，通過;游歷;
plan
[pl?n]
n. 計劃;打算;平面圖;示意圖;
vt.& vi. 計劃，打算，設計;
??? 情景例句
She was caught in the branches of our tree.
被我們家樹上的樹枝夾住了。
How long could the buyer expect your product to last?
購買者期望你們產品的使用期是多久呢？
So was born the echo-sounding apparatus, now in general use in ships.
這樣就產生了目前各種船舶上普遍應用的回聲探測儀。