1. play host to : 招待；
及物动词
1. We attended a dinner party hosted by the president of the company.
我们出席了公司总裁举办的宴会。
2. It remains unknown which country will host the international tennis tournament.
现在仍不知道哪个国家主办国际网球锦标赛。
名词
1. Mr Brown was our host at the party.
布朗先生是我们晚会的主人。
2. A whole host of difficulties has / have arisen.
出现了一大堆的困难。
3. Yesterday we were hosts to a few friends.
昨天我们接待了几位朋友。
1. 主计算机：1.主计算机 主计算机(Host)简称主机,是计算机网络中承担数据处理的计算机系统,可以是单机系统,也可以是多机系统. 主计算机应具有完成批处理(实时或交互分时)能力..
2. host：low hypo-osmotic swelling test; 低渗膨胀试验
3. host：hypotonic swelling treatment; 低渗膨胀
1. （举办聚会等的）主人，东道主
The host at a party is the person who has invited the guests and provides the food, drink, or entertainment.
e.g. Apart from my host, I didn't know a single person there...
除了主人外，那里的人我一个也不认识。
e.g. Tommy Sopwith was always the perfect host.
汤米·索普威斯对人一向热情款待。
2. 作为主人组织，做东举办（聚会等）
If someone hosts a party, dinner, or other function, they have invited the guests and provide the food, drink, or entertainment.
host的近义词
e.g. Tonight she hosts a ball for 300 guests.
今晚她做东举办一场有300名客人参加的舞会。
e.g. ...a banquet hosted by the president of Kazakhstan.
哈萨克斯坦总统举行的宴会
3. （某项活动的）主办国（或城市、机构）
A country, city, or organization that is the host of an event provides the facilities for that event to take place.
e.g. Barcelona was chosen to be host of the 1992 Olympic games.
巴塞罗那获选为1992年奥运会的主办城市。
e.g. ...a preliminary qualifying tournament in Andorra involving the host country.
在安道尔举行的有东道国参加的预选资格赛
4. （国家、城市或机构）主办（活动）
If a country, city, or organization hosts an event, they provide the facilities for the event to take place.
e.g. Cannes hosts the annual film festival.
戛纳每年主办电影节。
5. 主办（活动）;接待（贵客）
If a person or country plays host to an event or an important visitor, they host the event or the visit.
e.g. In 1987 Canada played host to the Commonwealth Conference...
1987年加拿大主办了英联邦大会。
e.g. The Prime Minister played host to French Premier Jacques Chirac.
首相接待了法国总理雅克·希拉克。
6. （广播、电视的）节目主持人
The host of a radio or television show is the person who introduces it and talks to the people who appear in it.
host的意思
e.g. I am host of a live radio programme.
我是一个电台直播节目的主持人。
7. 主持（广播、电视节目）
The person who hosts a radio or television show introduces it and talks to the people who appear in it.
e.g. She also hosts a show on St Petersburg Radio.
她还在圣彼得堡电台主持一个节目。
8. 大量;许多
A host of things is a lot of them.
e.g. A host of problems may delay the opening of the Channel Tunnel...
可能推迟英吉利海峡隧道开通的问题一大筐。
e.g. Today we have radios, TVs, and a whole host of gadgets powered by electricity.
今天我们有收音机、电视机和一大堆小型电器。
9. （生物的）生长地，栖息地
If an area is host to living things, those creatures live and feed in that area.
e.g. Uganda's beautiful highlands are host to a wide range of wildlife.
乌干达美丽的高地是众多野生动物的栖息地。
10. （计算机）主机
A host or a host computer is the main computer in a network of computers, which controls the most important files and programs.
11. （寄生物的）寄主，宿主
The host of a parasite is the plant or animal which it lives on or inside and from which it gets its food.
e.g. When the eggs hatch the larvae eat the living flesh of the host animal.
当卵孵化后，幼虫取食寄主的鲜肉。
12. 圣体（基督教圣餐礼等宗教仪式中代表耶稣躯体的面饼）
The Host is the bread which is used to represent the body of Christ in Christian church services such as Holy Communion.