in situ 在原来位置
in situ[ adv ]
in the original or natural place or site
<adv.all>
carcinoma in situthe archeologists left the pottery in place
In situ \In si"tu\adv. & adj. [L.]
1. In its natural or original position or place; in position;
-- said specif., in geology, of a rock, soil, or fossil,
when in the situation in which it was originally formed or
deposited.
[Webster 1913 Suppl.]
2. (Med.) In its original position; not extending beyond the
place of origin; localized and undisturbed; as, carcinoma
in situ.
[PJC]