考研英语是一门需要长时间积累的学科，对于备战2015考研的学子们来说，从现阶段到6月份为夯实基础阶段，在此阶段，同学们应该主攻单词和语法，坚持每天1-2篇的英语阅读以此来培养语感。

　　Social- media firms are investigating whether they can tap the micro transactions market— say, by offering virtual currencies or goods that users can use as barter—though forced partnerships with local telecoms firms threaten the profitability of such schemes.

　　词汇突破：
tap 开发
　　micro transactions 微交易
　　barter实物交易;交易品，互换品
　　virtual currencies 虚拟货币
　　profitability 收益性
　　schemes 计划
　　Say 比如说，常用来举例。

　　主干识别：Social-media firms are investigating whether+宾语从句
　　其他成分：插入语： by offering virtual currencies or goods that users can use as barter that users can use as barter 定语从句修饰goods. 根 据语义可以判断出不是修饰currencies
　　状语从句: though forced partnerships with local telecoms firms threaten the profitability of such schemes
　　再解释一下：forced partnerships with local telecoms firms threaten the profitability of such schemes
　　结构：A threaten B
　　主语A：forced partnerships with local telecoms firms(forced 强迫性的)(强迫性的同当地电信公司的合作关系)核心主语：partnerships;
　　B: the profitability of such schemes

　　参考译文：社交媒体公司正在研究是否可以开发微交易市场，比如说，提供虚拟货币或者可以作为物物交换的商品，虽然被迫与当地的电信企业建立起来的合作关系正威胁着这些计划的可盈利性。