If you are in bed when the earthquake strikes, stay there. Hold on and protect your head with a pillow, unless you are under a heavy light fixture that could fall.

如果地震发生时，你在床上，留在那里不要动，用枕头护住你的头部，除非你正好在一个可能会落下来的重型灯具的下面。

youdao

Hold on and protect your head with a pillow, unless you are under a heavy light fixture that could fall.

等候并用枕头保护你的头，除非你在一个可能坠落的重型灯具下面。

youdao

Thick walls are extremely heavy, and allow less room for windows and light.

VOA: special.2010.03.31

At the bottom of the light house was big heavy rocks.

VOA: special.2010.05.08

Batteries are bulky and heavy, and for machines that need to be light.

VOA: standard.2010.08.11

The military intercepted a ship in the Mediterranean Sea and found heavy and light weapons aboard, Lebanon's National News Agency reported.

CNN: STORY HIGHLIGHTS

Obviously, your tone is going to matter a lot here: you can make the delivery as heavy or light as the situation warrants.

FORBES: Woman Interruptus: Interrupting Is Not A Form Of Encouragement

Low demand during 2011 was caused by high rare earths prices from both heavy and light rare earths metals, which despite their fluttering prices, remain historically high.

FORBES: 2012 Outlook: Uncertainty Continues For Rare Earths Prices, China Still Major Player