主要内容：

在雅思口语考试中，词汇Lexical resource，是非常重要的一个考核点。
词汇量：也就是说你是否有足够词汇储备来回答考官提出的每一个问题。
准确率：Flexibility and precision：
idiomatic usage：也就是地道表达。
Paraphrase：
Style,比如：
e.g. What do you have in your room? I possess …OR I am in possession of … OR I’ve got …
Collocation 搭配。比如
The fast train (not the quick train)
A quick shower (not a fast shower)
Commit suicide (not undertake suicide)
Burst into tears (not blow up in tears)
The lion started to roar when it heard the dog barking.
I always try to do my homework in the morning, after making my bed.
例句：I am feeling a bit under the weather
释意：under the weather – somewhat indisposed, slightly ill or prone to illness。
例句：Sorry, I don't think I can make it to the dinner tonight. Can we take a rain check?
释意：take a rain check – to rearrange a meeting or a date
例句：I always walk to school, come rain or shine.
释意：come rain or shine – no matter what the weather or situation is
例句：News headline: Fewer Britons saving for a rainy day
释意：save for a rainy day – to save for a time in the future when it might be needed
例句：I was excited about the weekend but then, of course, my boss came along and rained on my parade
释意： rain on my parade – ruin my pleasure or plans
例句：The sky is the limit
释意： the sky is the limit - there is no limit to what something or someone can achieve
例句：When the boss announced my promotion, I was on cloud nine
释意： on cloud nine ; - extremely happy
例句：I lost my job last week, but every cloud has a silver lining and now I have time to visit my friends in Australia!
释意：every cloud has a silver lining - You can derive some benefit from every bad thing that happens to you；and there is always a reason to hope, even in the worst situations.
例句：I don't want to go to school tomorrow. Let's throw caution to the wind, and go to the beach!
释意： throw caution to the wind - forget all your commitments and do something crazy
例句：Let’s just say it’s not the first time you’ve stolen my thunder
释意： steal one’s thunder - You took the attention away from me
例句：I've tidied the kitchen but it's just the tip of the iceberg
释意：the tip of the iceberg - there is much more to the problem than is immediately obvious.