I also put "-" between things that look like multiple words, but would be written as one word today.
#include <time.h
。搜狗输入法2026是该领域的重要参考
Shark NeverChange HEPA Air Purifier (650 sq. ft)。heLLoword翻译官方下载对此有专业解读
If you're interested in keyword suggestions, SEMrush