an experimental in sth
作可数名词用，单数时常后接 in 短语，说明所参与的具体实验或试验。
Each experimental in the trial was monitored closely.
试验中的每个实验对象都受到密切监测。
实验的对象。
实验的对象。
The subject of an experiment.
The experimentals were kept in separate cages so their results could be compared.
实验对象被分别关在单独的笼子里，以便比较它们的结果。
用法提示：experimentals 是 experimental 的复数形式，在此作名词，指多个实验对象。
Before the test, each experimental was measured and weighed.
测试前，每个实验对象都被测量和称重。
用法提示：experimental 作可数名词单数，用 each 限定，表示单个实验对象。
The research team observed the experimentals every day and recorded any changes.
研究团队每天观察实验对象，并记录任何变化。
用法提示：experimentals 作名词复数，是动词 observed 的宾语，指实验对象。
作可数名词用，单数时常后接 in 短语，说明所参与的具体实验或试验。
Each experimental in the trial was monitored closely.
试验中的每个实验对象都受到密切监测。
复数形式 the experimentals 通常指整个实验对象群体，谓语动词用复数。
The experimentals were observed for several weeks.
实验对象被观察了数周。
复数名词后可用 who 或 that 引导定语从句，对人作进一步限定。
The experimentals who took the drug recovered faster.
服用了这种药的实验对象恢复得更快。
grammar · medium
易错句子The team ran an experimental to test the new material.
正确表达The team ran an experiment to test the new material.
表示“做实验”这一活动时要用名词 experiment；作名词的 experimental 指“实验对象（人或动物）”，不能表示实验本身。汉语“实验”一词兼指活动与对象，直译时容易误用 experimental。
grammar · medium
易错句子The lab recruited five experimental for the drug trial.
正确表达The lab recruited five experimentals for the drug trial.
作“实验对象”讲的 experimental 是可数名词，复数要加 -s；汉语名词没有复数形态，学习者常漏掉复数标记。
grammar · medium
易错句子She was the experimental who ran the whole study.
正确表达She was the experimenter who ran the whole study.
experimental 指接受实验的“实验对象”，实施实验的人应用 experimenter（实验者）；汉语常用“实验”笼统表达两种角色，容易混用。
实验对象和对照组
The experimentals and the controls were tested under the same conditions.
实验对象和对照组在相同条件下接受测试。
一组实验对象
The researchers split a group of experimentals into two subgroups.
研究人员把一组实验对象分成了两个小组。
健康的实验对象
Only healthy experimentals took part in the first phase of the study.
只有健康的实验对象参加了研究的第一阶段。
实验对象的数量
The number of experimentals was too small for the results to be conclusive.
实验对象的数量太少，结果无法下定论。
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