Example sentences of "[noun sg] [prep] about [art] time [prep] " in BNC.

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1 I could check that she had begun to get her divorce at about the time of Sir Charles ' death .
2 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 .
3 Why would Sara say that she had seen Alfred leaving his brother 's yard at about the time of the crime if she had not ?
4 This led him to investigate in more detail the effect of alcohol on chromosome segregation at about the time of conception , and its effects on early development of the mouse embryo in vivo .
5 The total amount of growth hormone that is secreted per day increases to a maximum at about the time of puberty and is partially responsible for the growth spurt that is seen at about this time .
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