have to have no contrast
The earthquake did not damage
Do not have Commercially Launder
Living in harmory not to be echoed
Melt the frost not to stop the cold wind
observing the blood not to stop bleeding
Know-how
技术决窍
专门技能
专有技术
专门技能生产经验专门知识
关键技术
技术诀窍
技术
诀窍
right to know the disease
The Right to Know the Environment
the right to know the fact of environmental cases
Design about how to establish the model
How to Apply for a Small House Grant