Sentence examples for but they usually require from inspiring English sources

Manual removals, cages or fences are classical methods, but they usually require large areas or multiple procedural controls to avoid experimental artefacts.

But they usually require contrast dyes to be injected into the bloodstream, says Lihong Wang, a photoacoustic researcher at Washington University in St Louis, Missouri.

Maraging steels combine excellent mechanical properties at medium-high temperatures with good fracture toughness, but they usually require the aid of thermochemical treatments to enhance superficial properties such as resistance to abrasive wear and corrosion resistance.

Is this true? A. Headphones that use so-called active noise reduction can work quite well for minimizing steady background sounds like jet engines or crowd noise, but they usually require batteries.

Analytical rubrics provide scoring for individual aspects of a learning objective, but they usually require more time to create.

But they usually require documentation of the hardship, like a foreclosure notice or medical bills, and employees are often restricted from making new contributions for a period after the withdrawal).

Open source and indie web apps exist, but are rarely used, because they usually require you to run your own server, which few people want to do.

But, these methods are harmful as they usually require the use of toxic chemicals which lead to the environmental toxicity or biological hazards.

When symptomatic, they usually require surgical treatment.

Though many are, they usually require approved dimmer switches.

They usually require impedance sensing as readout technique.