他在小声嘀咕什么?
Tā zài xiǎo shēng dígu shénme?
English
What is he muttering about?
to mutter
to mutter; to feel apprehensive
Every character draws itself stroke by stroke, then hands you the brush to trace it yourself.
Nice writing!
他在小声嘀咕什么?
Tā zài xiǎo shēng dígu shénme?
What is he muttering about?
别在心里嘀咕了。
Bié zài xīnlǐ dígu le.
Stop muttering to yourself.