The fundamental constraint for mobile devices is limitations because of energy supply and bandwidth.

能量供应和带宽的限制成为制约移动设备的基本因素。

youdao

Because the SchemaFactory is tied to a specific constraint model, you must supply this value at factory construction.

因为SchemaFactory是与具体的约束模型联系在一起的，所以必须在工厂构造的时候提供这个值。

youdao

A workaround to this is to supply a default value to the not NULL column whose value comes from a BEFORE INSERT TRIGGER, so that the constraint is not violated.

一种解决方法是给从BEFORE INSERT触发器取得值的NOT null列提供默认值，这样就不会违反约束。

youdao

This, to an extent, mitigates the supply constraint reason for the lower-than-expected sales but more people preferring to pre-order the device still remains a viable candidate.

FORBES: Overwhelming Pre-Order Demand Could Be The Reason Behind Apple's Disappointing iPhone 5 Sales

The offsetting of refinery shutdowns in the Northeast by, for instance, the expansion of Motiva Enterprises a joint venture between Shell (RDS.A) and Saudi Refining of its Port Arthur, Texas refinery to 600, 000 barrels a day, may also help prevent supply-constraint driven gasoline prices spikes.

FORBES: Spiking Summer Gas Prices to Ding Home Sales, Consumer Confidence

The shuttering of various European and U.S. northeast refinery operations of late due to unfavorable margins and a difficult lending environment could also eventually lead to supply-constraint driven gasoline price spikes when demand starts to pick up again towards the summer peak driving season period, say analysts.

FORBES: Spiking Summer Gas Prices to Ding Home Sales, Consumer Confidence