delta
🇺🇸
/ˈdeltə/
🇬🇧
/ˈdeltə/
the fourth letter of the Greek alphabet (Δ, δ)
The symbol for delta is Δ.
delta的符号是Δ。
a triangular area of land where a river divides into smaller rivers before going into the sea
Farmers rely on the fertile soil of the delta for growing crops.
农民依赖三角洲肥沃的土壤种庄稼。
a form of the COVID-19 virus identified in 2020 and named Delta
The Delta variant caused a new wave of infections.
Delta变种引发了新一波的感染。