In Type 3 situations, there are few alternatives, but the ability to switch without difficulty creates a threat that companies can use to negotiate concessions from existing suppliers.

在第三种情况下，几乎没有其他选择，但毫无困难地转换的能力造成了一种威胁，企业可以利用这种威胁与现有供应商谈判让步。

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Xiaofan, a smart boy from Shenzhen, used to have difficulty in getting up on time, and his alarm clock was of no use at all.

小凡，一个来自深圳的聪明男孩，曾经很难按时起床，他的闹钟根本没用。

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People with low vision have difficulty seeing the screen and typically use a screen magnifier to select and enlarge portions of it.

视力低下的人看屏幕有困难，他们使用屏幕放大器来选择并放大一部分。

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For over an hour I listened to a group of their users complain to me about their current program: its lack of features, its poor interface, its difficulty to use.

FORBES: I Apologize To My BlackBerry

Road users and people working nearby reported seeing drivers in difficulty and unsure which lanes to use.

BBC: Cornwall A30 roundabout 're-education' needed

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