ally ·noun (COUNTRY)
Definition: a country that has agreed to help another country, especially in a war Level: C2
第二次世界大战期间，美国和英国成为了盟友。
During the Second World War, the United States and the United Kingdom became ___allies.
签署这项条约是为了正式确立两国为战略盟友。
The treaty was signed to formalise the two nations as strategic ___allies.
为了寻求保护，这个小国与一个强大的盟友结成了联盟。
Seeking protection, the smaller country entered into an alliance with a powerful ___ally.