慢速英语:Washington's Cherry Blossoms Signal the Start of Spring

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festival - n. a special time or event when people gather to celebrate something

peak - adj.  at the highest point or level​

bloom - n. a time period in which a plant has many open flowers

uNPRedictable - adj. not capable of being known before happening

indicator - n. a sign that shows the condition or existence of something

all over the place (idiomatic) - not well organized or carefully considered

considerably - adv. by a large amount or to a large extent; greatly.