非球面的与球状体略微不同,只有很小偏离, 如镜片.Varying slightly from sphericityand having only slight aberration, as a lens.一种叫“博克球状体”(Bokglobule)的冷分子氢“小金块儿”形成逆着星团的剪影.A nugget of cold molecular hydrogen , called a Bok globule , is silhouetted...
Persons receiving cash should make disbursements of cash, record cash transactions.收款员必须做好现金支出记录,现金交易记录.Provide accurate accounting for cash receipts, cash disbursements, and cash balances.提供正确的现金收入 、 支出和结余记录.Making Disb...
The dynamic SIF variation was found to lag behind the stress - pulse impingement by several microseconds.人们发现,动态应力强度因子的变化滞后于应力脉冲冲击几微秒.Shoulder impingement syndrome is one of the most common painful shoulder disorders.肩夹击...