BLDs are an essential tool in FL learning, and illustrative example constitute the soul of BLDs. This means two things: one is that English-Chinese LDs cannot shirk responsibility onto MLDs in helping Chinese EFL learners; the other is that the efficiency of this learning tool largely depends on the edition of examples. However, examples in present-day English-Chinese LDs are by no means satisfact...学位：文学硕士院系专业：外文学院外文系_外国语言学及应用语言学学号：1993270
