The same principles which at first view lead to skepticism， pursued to a certain point， bring men back to common sense.
最初看似导致怀疑的原则，经过一定程度的追求，会使人回归常识。
Coal has been the backbone of industrial progress, but its future must balance economic needs with environmental responsibility.
The best ideas come when you’re not looking for them.
Only unfulfilled love can be romantic.
"In quantum mechanics, the act of observation changes the system being observed."