Complex Numbers and functions.

复数和函数。

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Many mathematical objects, such as sets of Numbers and functions, exhibit internal structure.

许多数学对象，例如数集和函数集合，表现出内部结构。

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Vertical Traffic Facilities: Including the types, numbers and functions of automatic escalators and lifts.

包括自动扶梯和电梯的选型、数量及功能划分。

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Casio has redesigned the ClassPad series' software keyboard to make this new model easier to use, organizing functions to correspond to three levels of learning difficulty, beginning with basic functions used by everyone like fractions, square roots, and trigonometric functions, then advanced functions like differential calculus, complex compound numbers, and sigma calculations, and finally even more advanced calculations including piecewise and user-defined formulas.

ENGADGET: Casio's touchscreen graphing calculator arrives in 2013, makes the TI-84+ look dated

OPTiM's Optimal Biz for Mobile platform enables companies to manage large numbers of employee smartphones and tablets, delivering functions like remote lock to prevent information leakage from lost or stolen devices.

ENGADGET: OPTiM outs wireless smartphone-to-smartphone screen sharing and remote control app for Android

The once vaunted IRS computer system has trouble accomplishing what would seem to be the most basic of functions: reconciling Social Security numbers, W-2 forms and even the number of children in a household.

CNN: An Overtaxed IRS