| 1. | Their marriage has been on shaky ground .
他们的婚姻一直不牢固。 |
| 2. | The table is going to collapse one of these days; the legs are very weak .
这桌子总有一天要垮下来；它的腿很不牢固。 |
| 3. | The remains of the wooden hull are fragile and need special handling .
木船体的残骸是很不牢固的，搬动时需要特别小心。 |
| 4. | Events of the past week had also demonstrated how precarious was the base from which our diplomacy was operating .
上周的事态发展表明我们开展外交活动所依据的基础是何等不牢固。 |
| 5. | These were more vulnerable to blast because of poor framing and connections and were readily burned out by fire .
由于构架安装和连结得不牢固，这种桁架更易受爆震波的破坏，并也易被火烧毁。 |
| 6. | The frail wooden bridge cracked
这座不牢固的木桥断裂了。 |
| 7. | But its teeth are weak
但是它的牙齿不牢固了。 |
| 8. | Defective load : insecure
载物欠妥：不牢固 |
| 9. | Improperly meshed or worn gear wheels , gear wheel brackets broken or improperly secured
齿轮啮合不好或破损，齿轮支架破裂或不牢固。 |
| 10. | A rope of sand
不牢固的结合 |
