而在网络交际中，由于交谈者隐匿，使人无法由直观达到判断对方的经历、社会背景、心理背景等情况。
But in the network Communication, as a result of communicators are hidden, it can not be achieved to known each other's experience, social background, psychological background and so on.
它向学习者直观而生动地展现英语语言的背景，为学习者创造真实的、学习英语语言的环境，使学习者能够更好提高听说能力。
It shows the setting of English language racily to learner, create for learner true, the environment that learns English language, make learner can better rise hear of ability.
另外单纯的观测结果数据库并不能直观地反应观测样地以及样地的其他背景特征。
On the other hand, the database of simple observation can not intuitively reflects the sample plots and their background characteristics.
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