Terms: saturated fat - oils that make a hard soap. Usually come in a solid form and need to be melted before using. coconut, cocoa butter, palm oil are examples.

饱和脂肪：可以制作质地较硬的皂；通常是以固体型式存在，需加热溶解。如，椰子油，可可脂，棕榈油等。

youdao

Soap does not lather well in hard water.

肥皂在硬水中起不了多少泡沫。

《牛津词典》

Although many developer tools make it relatively easy to work with SOAP and WSDL, I consider them heavyweight technology, because they're hard to work with if you don't use those tools.

尽管有许多开发工具大大简化了对SOAP和WSDL的处理过程，但是我仍然把它们看作重型技术，因为如果不使用这些工具，SOAP和WSDL是很难处理的。

youdao

It was hard work. The wet clothes were heavy, and the soap had lye in it.

VOA: special.2010.03.28

Soap was so hard to come by, even completely nonexistent sometimes.

CNN: Recycling hotel soap to save lives

The private-sector soap companies and the government officials and health workers found it hard to understand each other at first.

ECONOMIST: Just add soap and water