The silence between them was heavy, filled with unspoken words and unresolved emotions.
他们之间的沉默很沉重，充满了未说出口的话和未解决的情感。
Resource development must balance economic benefits and ecological protection to achieve sustainable development.
To be a writer is to be a spy on life.
The great thing about film is that it can take you anywhere in the world, and you can tell any story you want.
在数学中，最简单的问题往往能引出最深刻的见解。