不牢固

• Their marriage has been on shaky ground .
  他们的婚姻一直不牢固。
• 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。
• 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。
• 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。
• 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。
• The frail wooden bridge cracked
  这座不牢固的木桥断裂了。
• But its teeth are weak
  但是它的牙齿不牢固了。
• Defective load : insecure
  载物欠妥：不牢固
• 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。
• A rope of sand
  不牢固的结合