two at a time; two by two; in twos
ignition; detonation; triggering; explosion
explosion; detonation; eruption; eruption (of discontent, etc.); outburst; outpouring
to envelop; to blanket; to cloak
to wrap up; to pack; to cover; to envelop; to conceal (a feeling); to hide
since some time ago; for some time; for quite a while
how many times; how many degrees (temperature, angle, etc.)
just (now); quite (near); unintentionally; subconsciously
sudden; abrupt; urgent; pressing; steep; sharp; rapid
next (year, spring, etc.); coming; since (last month, etc.); for (20 years, etc.)
expected value; expectation value; expectation
invisibly; secretly; privately
to slide into; to slip into
muscle; tendon; vein; artery; fiber; fibre; line
to inhale; to breathe in; to suck up; to absorb; to soak up
element (esp. component in electronics); elemental device; device; data; datum
heat; fever; temperature; zeal; passion
ignition; lighting; firing; setting off
to shed light; to cast light
elegance; grace; article; item; counter for items (of food, etc.); counter for dishes or courses (at a restaurant)
to catch; to stop the blow; to react to; to take (advice, etc.); to accept
person's origin (e.g. city, country, parentage, school)
person with a lot of experience; old hand; veteran (in a particular field)
small fish; small fry; (a) nobody; small fry; unimportant person
full throttle; full power
little less than; slightly fewer than; just under; weakness; the weak
charge (electrical); recharging; charge (fee); topping up (a contactless smart card); recharging; refuelling; charge
number of times; frequency; count
previous time; last time; previous installment; previous instalment; previous session
to burn down (to the ground); to clear away by burning; to reduce to ashes; to burn off
at the most; at best; to the utmost; as much as possible; as much as one can
corpuscle; minute particle; particulate
effect; efficacy; validity; potency