Example sentences of "to occur at [adj] [noun] " in BNC.

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1 Whatever the exact mechanism for U/Pb fractionation , it seems to occur at shallow depths in the mantle at about the time of formation of the local oceanic lithosphere .
2 It is not unusual for a pH value of between 4 and 5 to occur at certain locations far removed from human interference ( Charlson and Rodhe , 1982 ; Hibbard , 1982 ) .
3 In this case it is syllables ( rather than stressed syllables ) that tend to occur at regular intervals , thus giving the language a staccato rhythm .
4 The theory also claims that while some languages ( e.g. Russian and Arabic ) have stress-timed rhythm similar to that of English , others ( such as French , Telugu and Yoruba ) have a different rhythmical structure called syllable-timed rhythm ; in these languages , all syllables , whether stressed or unstressed , tend to occur at regular time-intervals and the time between stressed syllables will be shorter or longer in proportion to the number of unstressed syllables .
5 In this particular case , however , there was no such conformity ; the attacks seemed to occur at random intervals and in many differing situations .
6 Still more complex behaviours , such as the spinning of an orb web by a spider , or the singing of the species-specific song by a bird , depend on an interaction between innate structures generating particular movements , on innate tendencies to be reinforced by particular sensory inputs , and on experience , which may have to occur at particular times during development .
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