您要查找的是不是：
- This vaccine will give you immunity for two years. 接种这种疫苗可有两年免疫力。
- An unapproved vaccine; an unapproved protest march. 未经试验的疫苗; 未获批准的抗议示威
- Loosely, a mathematical or logic operator. 不严格地说，一种数学或逻辑运算符。
- That store operator ripped me off. 那个商店的营业员把我骗了。
- An oral thermometer; an oral vaccine. 口用体温计; 口服菌苗
- The operator told the caller that the line is busy. 接线生告诉打电话的人对方电话占线。
- Ring the operator and ask for Freefone 8921. 接通接线生，然後要免费通话8921号。
- The intricate machine requires a skilled operator. 这种复杂精细的机器须由技能熟练的人操作。
- Be careful with him -- he's a cute operator. 对他你得留神,他是个精明圆滑的家夥。
- Do you know the telegraph operator living over the way? 你认识住在路对面的那个报务员吗？
- She is the local representative for a British tour operator. 她是一位英国旅游经营者的当地代表。
- The search for a new vaccine took priority over all other medical research. 在各种医药研究中，应首先解决寻找新疫苗的问题。
- The smallpox vaccine has saved many lives. 天花疫苗挽救了许多人的生命。
- The vaccine was used to protect the whole population against infection. 这种疫苗用以为全体居民预防传染病。
- Operator, we are cut off. Can you reconnect me, please? 接线员，我们的电话断了。请再给我接一下可以吗？
- He failed many times but he finally broke through to find a successful polio vaccine. 他失败了许多次，但终于发现了有效的预防小儿麻痹症的疫苗。
- Salk vaccine is a"killed" vaccine. 沙克疫苗是一种不会传染的疫苗。
- Now there's a vaccine for measles. 如今已经有麻疹疫苗。
- Operator, please get me Bank of China, Beijing branch. 接线员，请给我接中国银行北京分行。
- The radio operator sent (out) an appeal for help to headquarters. 无线电报务员向司令部发出求救信号。
