If the index of the current letter is equal to the length of the string, this variable is an empty string.

如果当前字母的下标和字符串的长度相等，那么这个变量是一个空字符串。

youdao

He told them to press a button with either their right or left index fingers whenever they felt the urge and to remember the letter that was showing on the screen when they made the decision.

他告诉他们任何时候只要感觉可以就用右手或左手食指按下按钮，并记下他们做出这一决定时出现在屏幕上的字母。

youdao

He told them to press a button with either their right or left index fingers whenever they felt the urge, and to remember the letter that was showing on the screen when they made the decision.

他告诉他们任何时候只要感觉可以就用右手或左手食指按下按钮，并记下他们做出这一决定时出现在屏幕上的字母。

youdao

When I finally had a chance to speak directly with the president of the company, he used several four-letter words to describe index funds and Vanguard before throwing me out of his office.

FORBES: Why I Index by Rick Ferri

Soon after the column was published I got a scolding letter from John Bogle, founder of Vanguard Group and patron saint of cheap index funds.

FORBES: How Many Funds Should You Own?