on alternate + plural noun
表示“每隔一个的”，常与表示时间的复数名词连用。
The shop is closed on alternate Mondays.
这家商店每隔一个周一歇业。
每隔一个的；间隔的；互生的；交替发生的；轮流进行的；每隔一个的；每第二个的；互生的(指叶子在茎上交替排列)
happening by turns; first one and then the other
交替发生的；轮流进行的
Happening by turns; one following the other in succession of time or place; first one and then the other (repeatedly).
每隔一个的；每第二个的
Designating the members in a series, which regularly intervene between the members of another series, as the odd or even numbers of the numerals; every other; every second.
互生的(指叶子在茎上交替排列)
Distributed singly at different heights of the stem, and at equal intervals as respects angular divergence
Alternate lanes are closed for construction.
交替车道因施工关闭。
用法提示：形容词“alternate”修饰“lanes”，表示车道交替关闭。
We meet on alternate Fridays.
我们每隔一个周五见面。
用法提示：形容词“alternate”修饰“Fridays”，表示每隔一个周五。
She works alternate shifts to support her family.
她轮班工作以养家。
用法提示：形容词“alternate”修饰“shifts”，表示轮流的班次。
表示“每隔一个的”，常与表示时间的复数名词连用。
The shop is closed on alternate Mondays.
这家商店每隔一个周一歇业。
表示两种成分一层隔一层地交替排列。
The cake has alternate layers of sponge and cream.
这个蛋糕有海绵层和奶油层交替叠放。
植物学中指叶片在茎上交替排列，而非两两相对。
The tree has alternate leaves along its branches.
这棵树的叶子沿枝条互生。
grammar · medium
易错句子The lights flashed red and green alternate.
正确表达The lights flashed red and green alternately.
alternate 是形容词，只能修饰名词或在名词前作定语；这里要修饰动词 flashed、表示“交替地”，必须用副词 alternately。汉语“交替”没有词形变化，学生容易直接把形容词拿来当状语用。
grammar · medium
易错句子She goes to the hospital for a check-up on alternate day.
正确表达She goes to the hospital for a check-up on alternate days.
alternate 作形容词表示“每隔一个的”时，指的是序列中隔一个出现的事物，所以后面要跟可数名词复数（on alternate days＝每隔一天）。汉语“每隔一天”没有复数标记，学生容易漏掉词尾 -s。
每隔一天
I go swimming on alternate days.
我每隔一天去游泳。
每隔一周
The two teams train on alternate weeks.
这两支队伍每隔一周训练一次。
互生叶
This plant has alternate leaves arranged along the stem.
这种植物的叶子沿茎互生排列。
内错角
The two parallel lines create equal alternate angles.
这两条平行线形成相等的内错角。
隔行；交替行
Farmers planted the young trees in alternate rows.
农民们把树苗隔行栽种。
alter
alt
alter
alter
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alter
root; related: alternative, alternation, alternately
suffix; related: fortunate, passionate, considerate
交替发生的事物常按固定顺序排列，sequence强调前后的次序关系。
alternate描述交替状态，rotate描述轮换动作，二者都涉及有规律地更换。
“每隔一个”意味着中间存在间隔，interval强调时间或空间上的间距。
交替往复会形成有规律的节奏，rhythm概括这种周期性变化。
交替过程可能构成一个循环，cycle强调周而复始的重复模式。
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Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY, WORDNET.