Sentence examples for were usually needed from inspiring English sources

However, most of existing controllers were developed on the basis of multi-states feedback of the system and state observers were usually needed.

Rather, the researchers were looking for a situation like Indonesia under Suharto, where political connections were usually needed to secure import licenses, or Russia in the mid-1990s, when some state employees made fortunes overnight as the state privatized assets.

Various low molecular weight electron transfer agents such as 1-hydroxybenzotriazole (HOBT) were usually needed by laccase to catalyze ligninolysis [ 34].

Three treatments are usually needed.

Nevertheless, additional clarification is usually needed.

Nested iterative procedures are usually needed to solve these models.

Clarification is usually needed only when there are alternative points of view on an issue.

Several types of tests are usually needed to diagnose multiple myeloma.

"Compromise, leverage and patience are what is usually needed in these situations," he said.

Specialized equipment is usually needed for remote monitoring of blood pressure or heart rate, for example.

Periodically irrigation is usually needed to maintain the health of green roofs.