Words and phrases:
1.portfolio:the range of products or services offered by a particular company or organization （公司或机构提供的）系列产品，系列服务

    ◆ a portfolio of wines 系列葡萄酒

2.scale sth↔ˈup:to increase the size or number of sth 增大，扩大（规模或数量）

3.incentivize ( BrE also -ise ) v: to encourage sb to behave in a particular way by offering them a reward 激励；奖励

   1> incentivize sth

    ◆ ways to incentivize innovation 奖掖鼓励创新的途径

    2>incentivize sb to do sth

     ◆ You need to incentivize your existing customers to stay with you. 你得奖励并留住现有客户。

4.foot the ˈbill    IDIOM:( informal) to be responsible for paying the cost of sth 负担费用

   ◆ Once again it will be the taxpayer who has to foot the bill. 这一次掏腰包的又得是纳税人。

5.picking winners

6.shy away (from sth):to avoid doing sth because you are nervous or frightened 畏避；回避；躲避；避免做

   ◆ Hugh never shied away from his responsibilities. 该自己承担的责任，休从不回避。

7.on ˈfire:giving you a painful burning feeling 火辣辣；火烧火燎的

   ◆ He couldn't breathe. His chest was on fire. 他无法呼吸。他的胸部火辣辣地疼痛。

8.shroud in uncertainty  笼罩在不确定性中

   shroud  v

 1>  shroud  sth in sth (of darkness,clouds, cloth, etc. 黑暗、云、织物等 ) to cover or hide sth 覆盖；隐藏；遮蔽

    ◆ The city was shrouded in mist. 城市笼罩在雾霭之中。

   2> shroud sth in sth to hide information or keep it secret and mysterious 隐瞒；保密

     ◆ His family background is shrouded in mystery. 他的家庭背景蒙上了神秘的色彩。

9.disconcert sb:to make sb feel anxious, confused or embarrassed 使不安；使困惑；使尴尬

10.be/get ˌcaught ˈup in sth:to become involved in sth, especially when you do not want to be 被卷入；陷入

      ◆ Innocent passers-by got caught up in the riots. 无辜的过路人被卷入了那场暴乱.

11.musical chairs 抢座位游戏