- 重点词汇
- 射线
ray; beam; radiation
- 营地
campsite; camp; station; campground; bivouac; encampment; fort; base camp
- 免费
free; complimentary; gratis; courtesy; be free of charge; cost free; cost a dime; cost a penny; for free; at no cost; without payment; grant free of charge
- 在线
online; be online; on line
- 观看
watch; view; look at; see; look; observe; spectate; attend; take in; gaze; look on; look upon; viewing; watching; observation; spectatorship; have a butcher's