| aircraft | airplane |
| achieve | to succeed in something |
| reduce | to decrease in number or amount |
| design | to plan or make a detailed drawing for a building, clothes, or machine |
| engine | the part of a vehicle that produces power to make the vehicle move |
| steer | to control the direction in which a boat, car, etc. moves |
| condition | the state of something or someone is in. （状态，状况） |
| touch | the act of putting two things together with no space between them |
| be fed up with | be sick of |
| announce | o tell people sth officially, especially about a decision, plans, etc. |
| annoy | make someone angry or impatient |
| concept | a general idea (概念) |
| disaster | A disaster is a very bad accident such as an earthquake or a plane crash, especially one in which a lot of people are killed. |
| damage | to physically break something, make it not work. (损坏) |
| portable | to be easily carried or moved. |
| clarify | to make sth clearer or easier to understand |
| technology | 科技 |
