[ˌgær.ən'ti:]verbtransitive
MAKE
CERTAIN确保
■If something guarantees something else, it makes certain that it will happen确保，使必然发生
•[+ (that)] The £50 deposit guarantees(that)people return the boats after their hour has finished.50英镑的押金会确保人们在划完船后将船归还。
■If something is guaranteed to happen or have a particular result, it is certain that it will happen or have that result肯定…必然发生；肯定会有某种结果
•[+toinfinitive] Just looking at a picture of the sea isguaranteedtomake me feel sick.哪怕是看一眼大海的图片，我都会有晕船的感觉。
last-ditch attempt/effort
■an effort or attempt which is made at the end of a series of failures to solve a problem, and is not expected to succeed最后一招，最后一根救命稻草；孤注一掷
•In alast-ditchattempt to save his party from electoral defeat, he resigned from the leadership.为了避免他所在的政党在大选中失利，他使出了最后一招——辞去了领导职务。
if something, especially something bad, goes undetected, no one notices it
go/remain undetected
Doctors can make mistakes and diseases can remain undetected.
The thieves escaped undetected through a basement window.
nounonly singular
■a very short moment of time一瞬间，一刹那
•They brought out guns and for a split second nobody moved.他们拔出了枪，刹那间没有人敢动。
•We had to make a split-second (= very quick) decision.我们得迅速作出决定。
