Example sentences of "and [verb] at [adj] levels " in BNC.

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1 Detachment structures initiate at moderate dips in brittle upper crust and flatten at mid-crustal levels ( 10–15km depth ) , because stress axes rotate as a result of ductile ( perhaps fluid-like ) flow of a weak middle crust ( beneath the brittle to ductile transition zone ) .
2 This idea of a hierarchy of control allows the analyst to focus on each element in turn , and derive ideas about monitoring and controlling at various levels .
3 Assuming an oil price of about $33 for the fourth quarter of 1990 , and an average of about $30 for 1991 , inflation was expected to rise above 5 per cent in 1990 and stay at similar levels in 1991 .
4 Table 1 gives hypothetical figures for consumption , savings , taxes , imports , investment , government spending and exports at different levels of national income for a simple economy .
5 Foreign genes can readily be inserted into the virus genome and expressed at high levels .
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