Successful use of the variation method depends on our ability to make shrewd choice of the trial function.

成功地应用变分法取决于对尝试函数作精明选择的能力。

Shrewd foreigners traveling the world after, the final choice of Qingdao, Qingdao, illustrates the charm and appeal!

精明的外国人在周游了世界之后，最后的落脚点选择了青岛，足以说明青岛的魅力与吸引力！