eternal; unlimited; endless
to keep; to preserve; to hold; to last; to endure; to keep well (food)
whenever necessary; as needed; as required; at any time; at all times
same period; corresponding period; same year (of graduation, entering a company, etc.); contemporary; synchronization; synchronism
inclusion; complete coverage; comprehensiveness
right hand; right-hand side; right-hand direction; (on) the right
left hand; left-hand side; left-hand direction; (on) the left
integration; unification; unity; combination; consolidation; synthesis
to play a role; to serve a function; to play a part
always-on connection (esp. to the Internet)
complex; complicated; intricate; mixed (feelings)
self-satisfied look; triumphant expression
well-informed person; walking dictionary; extensive knowledge
to return; to come back; to turn over; to become extremely; to become completely
material; substance; matter
slope; incline; slope (of a linear function); gradient (vector calculus)
to keep in contact (e.g. by phone, mail, etc.); to keep in touch
different kind (species, variety); heterologous; heterogenous
interval; period of time; among; between; good opportunity; chance
joint ownership; co-ownership; sharing (e.g. a viewpoint); sharing (files, devices on a network, posts on social media, etc.)
-ing and -ing (e.g. "coming and going"); doing such things as...; expresses a command; (arch.) to be; (arch.) indicates completion or continuation of an action
pish; pooh; I see; oh; indeed
intelligence gathering; information gathering
model; dummy; model (profession); fashion model; model (of a vehicle, machine, etc.); version; model (e.g. mathematical)
to refer to; to use as reference
mapo tofu (spicy Sichuan dish of tofu and minced meat)
to connect; to link together; to tie; to fasten; to maintain; to preserve
slowly and quietly; smoothly
zip fastener; zipper; zip; chuck (device for holding a workpiece in a lathe or a tool in a drill)
enteric bacteria; intestinal bacteria
intestinal; inside the intestines
10^12; 1,000,000,000,000; trillion; sign; omen; indication
to reach; to amount to; to be up to the task; to come up to; to compare with; to be a match (for)
those (near the second person)
intestinal environment; microbiome
pipe; tube; gun barrel; gun; cannon; well lining