In some cases, schools should help children find new, more grown-up ways of doing the same things that are constant sources of joy: making art, making friends, making decisions.

The result of constant muscle tension and stiffness of joints, many of them are avoidable, and simple flexibility training can prevent these by making muscles stronger and keeping joints lubricated (潤滑 ).

People do it at the expense of everything that was a constant in their lives.

Indoor pollution, which includes sources like home heating and cooking, has remained constant over the past several decades despite advances in the area.

Some desalination plants exist where feasible, but they are costly to run and can need constant repairs.

No one should have to live with what a Texas mother described as constant stress, tension, even fear about money.

Are people suffering from gadget overload? Are they exhausted by the consumer equivalent of the brain fatigue—information overload—that is caused by constant updates of devices and online media?As you are probably aware, the latest job markets news isn’t good: Unemployment is still more than 9 percent, and new job growth has fallen close to zero.

By 1973, domestic US sources of oil were peaking, and the nation was importing more of its oil, depending on a constant flow from abroad to keep cars on the road and machines running.

By running constant deficits, it is dis-saving, even as households save more.

At heights of over 18000 feet, people may be climbing in a constant daze（恍惚）.

Constant complaints from passengers.

As constant travelers and parents of a 2-year-old, we sometimes fantasize about how much work we can do when one of us gets on a plane, undistracted by phones, friends, or movies.