To define is to limit.

The past is a ghost, haunting the present.

我对医学着迷，因为它是生死之间的界线。

"The strength of the Clan is in its warriors, and the strength of the warriors is in the Clan."

The future belongs to those who can balance energy needs with environmental responsibility.

做出伟大工作的唯一途径是热爱你所做的事。