standing stock meaning in English

立木材积
蕴藏量

That boy stood stock still , too terrified to breathe
那个男孩呆若木鸡地站着，吓得连气都不敢喘。
He rose up and stood stock - still , looking at the floor
他站起身来，一动不动地立在那里，眼睛盯着地板。
But the gut evacuation rates did not vary with the experimental temperature and body size . copepods usually performed feeding rhythms with maximum level at midnight and their feeding activities changed with the tide rhythms at the estuary area . in the laizhou bay , the daily grazing rate of the copepod population on phytoplankton was 20 . 81 ? 98 . 35 % of the primary production and 2 . 53 ? 6 . 36 % of the phytoplankton standing stock in summer
现场测得的桡足类摄食率结果表明，在莱州湾，夏季桡足类群体的日摄食量占初级生产力的20 . 81 ? 98 . 35 % ，占浮游植物现存量的2 . 53 ? 6 . 36 % ，潍河口，河口外浮游动物优势种群体的日摄食量占初级生产力的32 . 28 % ，占浮游植物现存量的14 . 12 % ，河口内对初级生产力的摄食压力< 3 % ，日摄食量小于浮游植物现存量的1 % 。