theory的意思是“学说”。
例句:
1、Da Vinci was methodical in his research, carefully recording his observations and theories.
达·芬奇搞研究井井有条,会详细记录观察资料和理论学说。
2、This ridiculous theory is based on a series of wrong assumptions.
这一荒诞的学说是以一系列错误的设想为依据的。
3、His theory has proved durable.
他的学说已经证明是经得起时间考验的。
4、I do not attach much weight to the theory.
我不十分重视这学说。
5、He has established his theory.
他确立了他的学说。