1.vaccine 疫苗

There is no vaccine against HIV infection.

现在还没有防艾滋病病毒传染的疫苗X~0ho4O6nC(5|!,0y!。

2.declare 宣布

I declare this bridge open.

我宣布大桥正式启用l9gXzVTgX3I。

3.delivery 配送

We won't charge you for delivery.

我们送货不收费~oL,NONS_6H|2o=。

4.postpone 推迟

If nobody objects, we'll postpone the meeting till next week.

如果没有人反对，我们就把会议推迟到下周WWo,%EVkfuB。