rudimentary /ˌruːdəˈmɛntəri/ adjective /ˌruːdəˈmɛntəri/
adjective
Learner's definition of RUDIMENTARY
[more rudimentary; most rudimentary] formal
2
: not very developed or advanced不成熟的;初步的 -
rudimentary technology不成熟的技术
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When baseball was in its rudimentary stages, different teams played by different rules.棒球运动发展早期,不同的球队按照不同的规则进行比赛。
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Some insects have only rudimentary wings.有些昆虫的翅膀已退化。