1. The ladder was placed insecurely against the wall, so I didn't feel comfortable climbing it.
梯子不稳固地靠在墙上，所以我不敢爬上去。

2. He tied the knot insecurely, causing the package to fall apart during transit.
他打结不牢固，导致包裹在运输过程中散了。

3. She held onto the railing insecurely as she descended the slippery stairs.
她下滑梯时手紧紧抓住扶手，一副不安全的样子。