the level or point at which you start to experience something， or at which something starts to happen 阈，界限;
在美剧《摩登家庭》S4E2中，Manny在回应妈妈的调侃时，就用到了今天的单词:Gloria: Manny doesn't believe that we know what we're doing. A couple of new hairs under his arm， and now he thinks he knows more than his own mother.
新冠核酸检测是阴性还是阳性的标准，就看新型冠状病毒核酸检测N基因和ORF基因Ct值的大小。这里的Ct，不是到医院里拍个片，它是实时荧光RT-PCR中的概念，C代表Cycle，t代表Threshold，又称循环阈值。
参考消息网11月19日报道（文/张熠柠）“赋能”有多火？上周在秘鲁举行的亚太经合组织第三十一次领导人非正式会议上，“赋能”（empower）位列“包容”（include）、“增长”（grow）之前，成为头号主题。谈到“赋能”，最容易想到“技术赋能”。
position /pə'ziʃn/ n. 位置，职位，职务。predecessor /'pri:disesə/ n. 前任，原有的事物。premise /'premis/ n. 前提，假设。prescription /pri'skripʃn/ n. 处方。preservation /ˌprezə'veiʃn/ n. 保护，防护。prestige /pre'sti:ʒ/ n. 威信，威望。priority /prai'ɒrəti/ n. 优先。prospect /'prɒspekt/ n. 前景，可能性。
Guimaraes PO， Quirk D， Furtado RH， et al. Tofacitinib in patients hospitalized with COVID-19 pneumonia. N Engl J Med 2021;
X吸入性肺炎(aspiration pneumonia)吸收剂量(absorbed dose)吸收剂量率(absorbed dose rate)吸收作用(absorption)希沃特(Sievert,Sv)洗脱(washout,WO)系统灵敏度(system sensitivit
The range of flammable vapour concentrations in air between the lower and upper flammable limits. Mixtures within this range are capable of being ignited and burning.
