Skilful men, of the medical and chirurgical profession, were of rare occurrence in the colony.

医疗和外科专业的熟练人员在殖民地很少见。

Moreover, the evidence indicates that full, or even approximately full, employment is of rare and short-lived occurrence.

此外，有证据表明， 充分或什至接近充分的就业是罕见且短暂的。

It sometimes happened that a solemn decree of parliament violated the asylum and restored the condemned man to the executioner; but this was of rare occurrence.

有时会发生议会的一项庄严法令违反庇护所并将被判处死刑的人恢复为刽子手;但这种情况很少见。