wèi le / bǎo hù / shī dì / xué shēng men / bǎ / yě wài gōng zuò / hé / shuǐ niǎo / guān chá / jié hé / qǐ lái为了保护湿地,学生们把野外工作和水鸟观察结合起来。To protect the wetlands, the students combined their fieldwork with observing waterbirds.