1.availability n. 可用性；有效性；实用性

One area of contention is the availability of nursery care.
争论的一个方面是提供幼儿保育的可能性W5U+3llGPn(w+K。

2.block vt. 阻止；阻塞；限制

Some students today blocked a main road that cuts through the centre of the city.
一些学生今天封锁了穿过市中心的公路wM8~s5sFRE;D|Fr%。

3.transaction n. 交易；事务；办理；会报，学报

The transaction is completed by payment of the fee.
交易在支付费用之后就完成了)6f@yYf&T|-u7_*CP。

4.smartphone n. 智能手机

The clothes connect to the web via a smartphone.
智能衣服通过智能手机连接到了网络34MuUDk%d~i^hQB。

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