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- 但知其一，不知其二be aware of one aspect but ignorant of the other
- 知其一，不知其二
- 只見其一，不見其二
- 人而無信,不知其可也How can one be acceptable without being trustworthy in words?
- 只知其一，不知其二
- 人而無知，不知其可if a man does not keep his word, what is he good for?
- TA特性與其二次迴路通流試驗的關係Relation of TA Characteristics to Its Secondary Circuit Flex Test
- 善守者，敵不知其所攻。Hence that general is skillful in attack whose opponent does not know what to defend
- 鄰苯二甲酸鹽phthalate
- 隱藏的不知其存在的。concealed and unsuspected.
- 磷酸二氫鉀monopotassium phosphate
- 鄰苯二甲酸phthalandione
- 從一個不知其名的敬慕者那兒收到鮮花Received flowers from an unknown admirer.
- 磷酸二氫鈉monosodium orthophosphate
- 磷酸氫二鈉disodium hydrogen phosphate
- 知其然而不知其所以然know that sth. is so but not why it is so; know what is done but not why it is done; know what happened, but not its whys and wherefores
- 知其然，不知其所以然know the hows but not the whys
- 一種簡單組裝納米沸石粒子層的方法及其二次法成膜研究A Simple Method of Nano-zeolite Crystals Self-assembly and Its Application to Zeolite Membrane Synthesis by Secondary Growth
- 君子於役，不知其期，曷至哉?My man's away to serve the state; I can't anticipate how long he will there stay Nor when he'll be on homeward way.
- 他連二加二等於幾都不知，更不用說做分數了。He can't add two and two,let alone do fractions.
