有些鸟儿是关不住的，因为它们的羽翼太耀眼。
Some birds are not close, because they are too bright.
The teacher must believe in the potential of his students.
"Books are the quietest and most constant of friends."
Success is measured not by profits alone, but by the positive impact we leave behind.
There are unknown forces in nature; when we give ourselves wholly to her, without reserve, she lends them to us; she shows us these forms, which our watching eyes do not see, which our intelligence does not understand or suspect.
The only way to learn mathematics is to do mathematics.