∑ mode and △ mode

ENSO mode and ENSO-like mode

period ratio of torsion mode to translation mode

2008 Beijing Olympic Ceremony Opening

30 years after the Reform and Opening Up

30 years of Chinese Reform and Opening

30 Years of Reform and Opening

30 years since the introduction of reform and opening up

30 Years’ Reform and Opening

30°tilted opening

3-D square opening cavity flow

accelerated the opening of the mainland market

access opening

acetylation opening reaction

additional bar around opening

adductor tendinous opening

Adhere to reforms and opening to the outside world

adit opening

admission opening