The candle softened and melted in the sun.

蜡烛在太阳光下变软而熔解。

The ice cream softened and began to melt.

冰淇淋变软融化。

After the Three Gorges Reservoir impounded, due to the rise of ground water, the flabbiness layers in landslides will become soft and collapse when they meet water.

三峡库区蓄水后,由于水位上升滑坡地区的软弱层遇到水就会变软引起滑塌。