to forecast; to predict

to guess; to conjecture; to surmise

speculation; to conjecture; to surmise; to speculate

to probe; to survey

to detect; to sense

to observe; to survey; observation (scientific etc)

unexpected; measureless; unexpected circumstance; contingency; mishap

to monitor

to survey; to measure; to conjecture

to guess; to conjecture

to try (sth) oneself

estimate

fitness test; to do a fitness test

(software development) to do beta testing

(software development) to do closed beta (or internal beta) testing

to investigate; to survey

unfathomable; unpredictable; treacherous

Basic Competence Test for Junior High School Students (Tw), abbr. for 國民中學學生基本學力測驗|国民中学学生基本学力测验

abbr. for 大學學科能力測驗|大学学科能力测验[Da4 xue2 Xue2 ke1 Neng2 li4 Ce4 yan4]

to take measurements; measured (speed etc); observed (as opposed to "estimated"); observational (astronomy)

rapid testing; (esp.) rapid antigen testing

pacing

to estimate visually; to gauge; visual assessment

blind testing

to speculate; to conjecture

telemetry

to take a breathalyzer test

to measure; measurement

hard to fathom

hard to fathom a person's mind (idiom)

to be prepared for accidents

unpredictable; changeable

to change unpredictably; unpredictable; erratic; treacherous

harboring unfathomable motives (idiom)

see 居心叵測|居心叵测[ju1 xin1 po3 ce4]

deep and unmeasurable (idiom); unfathomable depths; incomprehensible; enigmatic and impossible to predict

object detection (computer vision)

mystery; unfathomable; enigmatic

space exploration

profound mystery