1. It goes without saying that+句子= It is obvious that句子 = Obviously, S. + V. 不用说，很明显
It goes without saying that everyone should keep a balanced diet for the benefit of health.
不用说，为了健康，每个人都应该保持平衡的膳食。
2. I am greatly convinced (that)句子…. 我深信…
I am greatly convinced that we can improve our writing if we insist on reciting some useful sentences. 我深信，只要我们坚持每天背一些有用的句子,我们就可以提高我们的英语写作。
3. It can be easily proved (that)句子… 很容易证明….
