We also discuss the portfolio selection model which includes market frictions and short sales.
本文以投资者所获取的最大投资效用为目标函数,建立了摩擦市场上最优投资组合问题的数学模型;同时对于之前解决此类问题的很多文章中“证券市场不允许买空卖空风险资产和借贷无风险资产”的假设条件做了扩展,得到一个摩擦市场上适用于“允许买空卖空或借贷”的证券投资组合的二次规划模型。
Bernard： So you aren` t going to purchase an ultrasound machine to use at home?
伯纳德：所以妳们不会买超音波机器在家里用罗？
frozen precooked meals from the supermarket.
从超市买的冷冻熟肉。
She made several purchases at the supermarket.
她在超市买了许多东西。
No. I'll get some more when I go to the supermarket.
是的。我去超市时会再买些回来。
Bank lending over the buyer agreed to default?
银行放款超过约定属于买方违约？
A: The Lantern Festival is coming. Lots of people are now buying sweet dumpling from supermarket.
元宵节快到了，大家都到超市买汤圆呢！
I went to the supermarket on the way, and bought some daily necessities.
途中我去了趟超市, 买了点生活必需品。
I'm going to buy these things at the supermarket on my way home!
“回家时我将在超市买这些东西。”
Do We Need Anything from the Supermarket?
我们需要从超市买什么东西吗？
I went to the supermarket to get a few things,
我去一趟超级市场， 买了几样东西，
The vast majority of Americans do all their food shopping in supermarkets.
绝大多数美国人都在超级市场买食品。
Go to the supermarket and buy some tomatoes and some meat.
到超级市场去买一些西红柿和肉来。
My mother often goes shopping at the supermarket in our neighbourhood.
我妈妈经常去我家隔壁的超市买东西.
As stipulated, children over the height of one meter should be charged.
按规定，超过1米高的孩子都应该买票。
Buying Power Amount of money available in a margin account to buy securities based on excess margin divided by the margin requirement.
购买力保证金账户中超过利差要求，可以买入证券的那部分超额保证金。
We can get it for fifty cents in the supermarket near our home.
在我家附近的超级市场可以用五角买到。
I bought a leg of lamb in the supermarket and it cost me a king's ransom.
我从超级市场买回一只羔羊腿，价钱非常昂贵！
Mother bought a lot of fish from the supermarket, and gets ready to cook fresh fish soup.
妈妈从超市买回了好多鲜鱼, 准备做鲜鱼汤。