run out:
1.被用完,被耗盡
Our food soon ran out.
我們的食物不久就吃光了。
2.到期,期滿
3.跑開
4.結(jié)束；變得缺乏

look for:
尋找
She is looking for her lost child.
她正在尋找失去的孩子。

as long as:
固定詞組 ph.
1.只要
As long as do not rain!
只要不下雨就行！

track:
名詞 n. [C]
1.行蹤;軌道;足跡[P1]
We followed his tracks in the snow to a hut.
我們沿著他在雪地上留下的足跡走到一間小屋旁。
2.小徑,小道
3.鐵軌,軌道[P1]
The train jumped the track.
火車出軌了。
4.【體】跑道;徑賽運動
He runs around the track every morning.
他每天清晨繞著跑道跑步。
5.歷程;行動路線;思路
You're on the wrong track.
你想得不對了。
6.慣例,常規(guī)
7.(坦克等的)履帶

及物動詞 vt.
1.跟蹤;追蹤[(+to)]
It was not long before I tracked down the lost wallet.
不久我就找到了遺失的錢包。
The hunter tracked the wolf and managed to catch it.
獵人追蹤狼,并設(shè)法逮住它。
2.沿著(道路)走
3.走過,通過
4.在...上留下足跡
The dog tracked mud all over the shiny kitchen.
狗在廚房發(fā)亮的地板上留下一屋子泥。
The child rushed into the room and tracked dirt over thefloor.
小孩沖進房間,地板上全是帶泥的腳印。
5.為...鋪軌

不及物動詞 vi.
1.追蹤
2.留下足跡
3.(攝影機)跟蹤攝影[Q]
4.走[(+about)]