“More than+形容词”等于“很”或“非常”的意思，如：
In doing scientific experiments, one must be
more than careful with the instruments.
I assure you I am more than glad to help you.
PS：
More than的用法
A. “More than+名词”表示“不仅仅是”
1) Modern science is more than a large amount of information.
2) Jason is more than a lecturer; he is a writer, too.
We need more than material wealth to build our country.建设我们国家，不仅仅需要物质财富.
B. “More than+数词”含“以上”或“不止”之意，如：
3) I have known David for more than 20 years.
4) Let's carry out the test with more than the sample copy.
More than one person has made this suggestion. 不止一人提过这个建议.
C. “More than+形容词”等于“很”或“非常”的意思，如：
5) In doing scientific experiments, one must be more than careful with the instruments.
6) I assure you I am more than glad to help you.
D. more than + (that)
从句，其基本意义是“超过（=over）”，但可译成“简直不”“远非”. 难以，完全不能（其后通常连用情态动词can）
--That is more than I can understand . 那非我所能懂的.
--That is more than I can tell. 那事我实在不明白。
--The heat there was more than he could stand. 那儿的炎热程度是他所不能忍受的
此外，“more than”也在一些惯用语中出现，如：
--More often than not （经常），people tend to pay attention to what they can take rather than what they can give.
---All of us are more than a little concerned about（非常关心）the current economic problems