?? 詞語組成解析
trail
[trel]
vt. 跟蹤，追蹤;拖曳：讓…拖或飄揚在后面;拖沓而行;跟在…后面;
vi. （在比賽等中）輸;（尤指跟在他人后面）疲憊地走;（在比賽或其他競賽中）落后;蔓生;
n. 足跡;臭跡;小徑;一縷;
trail(draw)→拖；拉；追蹤；尾隨；蹤跡；小徑
riding
[['raidi?]]
n. 騎, 乘車, 乘, 騎術(shù), 騎馬
??? 情景例句
Do you know what I'm talking about?
知道我講的是什么嗎？
Because hs is thinking of majoring in this subject at the university.
因為他考慮把此學(xué)科作為在大學(xué)里的專業(yè)。
OK, everyone. Less noise, please! Gather round and listen carefully. First we are going to search the beach and the rock pools. Let me remind you what we are looking for: seaweeds, fish, plants, all living things. When you find anything, make a note where
00在這里集合，游泳之后再吃午餐。別著急！我們有足夠的時間。