他做了一系列实验。
He ran a series of experiments.
a series of; a string of
Every character draws itself, stroke by stroke. Then grab the brush: trace it yourself and hear the word when you finish.
Nice writing!
Chinese words snap together like bricks. Every word below shares a character with this one, so you are already halfway to knowing it.
他做了一系列实验。
He ran a series of experiments.
一系列问题怎么解决?
How can a series of problems be solved?