This study, we can see that Chinese students could not achieve high levels of linguistic competence both for grammar learning and vocabulary learning. But the vocabulary is not learned in depth. In other words, learners may acquire, through communicative tasks, a large number of words that they are able to recognize but could not use productively. Learners can recognize are far more than those that learners can use productively. Especially for academic vocabulary which are not in the General Service List but occur reasonably frequently over a wide range of academic texts. Therefore, knowing a word often means knowing the meaning of the word. In order to improve learners’ academic vocabulary knowledge in terms of both receptive and productive abilities, it is very important to combine learning vocabulary incidentally through communicative activities with explicit vocabulary learning.